Physics Homework Questions & Answers Archive

The following side lengths of a triangle form a right triangle. 4,5.6,7.07 When checking your numbers, round all your numbers to the nearest integer. True False

A student is getting her picture taken by a digital camera. The student is h0=1.55 m tall and she stands d0=4.75 m in front of the camera lens which has a focal length of f=0.011 m. what is expression for the resulting image distance, di.

Which branch of the left coronary artery continues around to the posterior of the heart leading to Marginal Circumflex Posterior interventricular

Since slopes are roughly equal along the cliff, what does this say about the type of slope material?

A 120 V electric coffeepot draws a current of 1.500 A . What is the resistance of its heating element? (Round the final answer to three decimal places.)

For the pair of vectors shown on the right, find the magnitude and direction angle of the resultant. What is the magnitude? (Type an exact answer, using radicals as needed.)

Which statement(s) below are TRUE? Check all that apply: When just Na+ channels are open, the neuron depolarizes because positive charge is entering the cell. When just K+ channels are open, the neuron hyperpolarizes because positive charge is leaving the cell. When just Na+ channels are open, the neuron hyperpolarizes because positive charge is leaving the cell. When just K+ channels are open, the neuron depolarizes because positive charge is entering the cell.

is an inhibitory neurotransmitter released from the termini of in the dark.

Graph two full periods of the function. y=5 sin (5x+20)-1

For the circuit in the given figure, use KVL to find the branch voltages V1 to V4. Assume A=9 V, B=10 V, C=3 V, and D=11 V. The branch voltages V1, V2, V3, and V4 are V, V, V, and V, respectively.

Solve the following triangle. A=20°, B=20°, c=9 C ≈ (Simplify your answer.) a ≈ (Type an integer or decimal rounded to two decimal places as needed.) b ≈ (Type an integer or decimal rounded to two decimal places as needed.)

Based on the chart below, if a particular exam results in delivery of 75,000 HU to the anode, how long will it take the anode to cool completely?

A speed regulator DC Drive utilizing a pulse tachometer feedback can achieve a speed regulation accuracy of 1% .001% .01% none of the above

What direction would a drive in Quadrant 3 operate: Forward Reverse Previous

Heisenberg's Uncertainty Principle is part of which component of the discussion of freewill and determinism?

The diameter of a proton is about 1.9 × 10^-15 meters. A hydrogen atom has an overall length of 100,000 times (or 1 × 10^5 times) the diameter of a proton. What is the length of the hydrogen atom, in meters, if it were written in scientific notation? 1.9 × 10^-8 meters 1.9 × 10^-12 meters 1.9 × 10^-15 meters 1.9 × 10^-10 meters

다음 DC 모터 시스템에 대하여 인가 전압에 대한 로터의 회전 각도 θ(t) 에 대한 전달 함수를 구하고, 시스템의 차수를 구하시오. 모터의 역기전력 상수 Kb, 모터의 토크 상수 Kt, 모터의 질량 관성 모멘트 J, 모터의 회전 점성 댐퍼 D 를 고려하시오.

An abnormally elastic ball bounces across the floor along the path that is shown. Rank the kinetic energy (KE) of the ball at the three marked locations.

Suppose that two electronic components in the guidance system for a missile operate independently and that each has a length of life governed by the exponential distribution with mean 5 (with measurements in hundreds of hours). (a) Find the probability density function for the average length of life of the two components. f(u)= , v ≥ , , elsewhere (b) Find the mean and variance of this average, using the answer in part (o). Check your answer by computing the mean and variance, using this theorem. mean variance

A 200 kg satellite is put into a low Earth orbit at an altitude of 300 km . (a) Calculate the orbital speed of the satellite.

An observer views the space shuttle from a distance of 7 mi from the launch pad as shown in the following figure. (a) Express the height of the space shuttle (in mi ) as a function of the angle of elevation θ. h= mi (b) Express the angle of elevation θ as a function of the height h of the space shuttle. θ=

QUESTION 5 A cylindrical object with an odd number of features, such as spokes or holes on a bolt circle, could better be described with a(n) section. revolved removed broken-out aligned

The junction between a motor neuron's axon and the muscle fiber plasma membrane is called a junction. A motor neuron and all of the skeletal muscle fibers it stimulates is called a 2 The actual gap between the axon terminal and the muscle fiber is called a Within the axon terminal are many small vesicles containing a neurotransmitter substance called When the and diffuses the axon, the neurotransmitter is released The combining the muscle cell membrane to combine with receptors there. causes a change of the neurotransmitter with the muscle membrane receptors sarcolemma of the The events that occur at a neuromuscular junction are depicted below. Identify every structure provided with a leader line. Key: a. axon terminal of motor neuron b. motor neuron axon branch c. myelinated axon of motor neuron d. muscle fiber e. sarcolemma of muscle fiber f. synaptic cleft g. Synaptic vesicle containing ACh h. terminal cistern of the SR i. triad

A pediatrician wants to determine the relation that may exist between a child's height and head circumference. She randomly selects 8 children, measures their height and head circumference, and obtains the data shown in the table. Head Height (inches)Circum 27.75 17.4 25 17.1 26.25 17.3 25.75 17 27.5 17.4 26.25 17.2 26 17.1 26.75 17.4 Determine if a linear relation exists between height and head circumference. (Note that the linear correlation coefficient between the height and head circumference of a child is r=0.842.)

Write the parametric equations of the line through the point (-1,0,3) and perpendicular to the plane -5x-8y-4z=2

Test a claim that the mean amount of lead in the air in U.S. cities is less than 0.037 microgram per cubic meter. It was found that the mean amount of lead in the air for the random sample of 56 U.S. cities is 0.039 microgram per cubic meter and the standard deviation is 0.068 microgram per cubic meter. At α=0.01, can the claim be supported? Complete parts (a) through (e) below. Assume the population is normally distributed. (a) Identify the claim and state H0 and Ha. H0: μ ≥ 0.037 Ha: μ < 0.037 (Type integers or decimals. Do not round.) The claim is the alternative hypothesis. (b) Find the critical value(s) and identify the rejection region(s). The critical value(s) is/are t0= (Use a comma to separate answers as needed. Round to two decimal places as needed.)

Find the exact value of the expression. sin(-13π/12) The exact value of sin(-13π/12) is

(a) Select the formula that relates the current I to the emf E and resistance R in a simple circuit. ☐ I = E + R ☐ I = E - R ☐ I = E × R ☐ I = E ÷ R ☐ I = R ÷ E (b) Describe what happens to the current as the resistance increases (all other factors remaining constant). ☐ Current increases ☐ Current decreases ☐ Current remains the same ☐ Current becomes zero ☐ Current becomes infinite (c) What is the SI unit for electrical resistance? ☐ Ohm (Ω) ☐ Ampere (A) ☐ Volt (V) ☐ Watt (W) ☐ Joule (J)

Understanding net electrical charge Would these two objects be attracted to each other? Repelled? Or not feel any force from each other at all? Note for advanced students: you can assume charge is measured in any convenient units, e.g. coulombs or units of e. Also multipole forces. These objects will.. attract each other repel each other exert no force on each other.

An accounting office has 6 incoming telephone lines. The probability distribution of the number of busy lines, is as follows: x P(x) ------ 0 0.01 1 0.12 2 0.2 3 0.32 4 0.19 5 0.15 6 0.01 Use the above probability distribution table to find the following: a. P(3<X<5)= (Round the answer to 2 decimals) b. P(1<X<4)= (Round the answer to 2 decimals) c. P(X ≤ 5)= (Round the answer to 2 decimals)

At STP, temperature and pressure have the values of

Determine whether the table represents a linear or an exponential function. Explain. x y 0 3 1 7 2 11 3 15 Danielle responded to her teacher: This is an exponential sequence because the numbers are increasing. The numbers are doubling. Is Danielle correct? Why or why not? Write your response in complete sentences using appropriate academic vocabulary. Include terms "linear function" "exponential function" and "rate" in your response.

Quantum numbers are interrelated values that indicate a specific orbital: the principal quantum number, n; the angular momentum quantum number, l; and the magnetic quantum number, ml. 0,1, ..., n-1 +1 / 2,-1 / 2 -l ...0 ...+l What are the allowed values for the principal quantum number n ? 1,2,3, ...

A curve is defined by the parametric equations x(t)=-4 tan t+3 and y(t)=3 cos t-3. Draw this graph by using the draggable points.

You wish to test the following claim (Ha) at a significance level of α=0.001. For the context of this problem, d= new - old where the first data set represents the rating for an old product and the second data set represents the scores for the new product. Ho: μd=0 Ha: μd<0 You believe the population of difference scores is normally distributed, but you do not know the standard deviation. You obtain the following sample of data: old new --- --- 50.6 0.3 49 40.6 59.5 25.2 59.1 39.5 57 33.3 47.7 23 What is the test statistic for this sample? (Report answer accurate to three decimal places.) t= The p -value is ... This p -value leads to a decision to... - reject the null - accept the null - fail to reject the null

You have a 52 kg object traveling at 17 m / s. That object hits a rough patch of ground and slides to a stop in 3.5 seconds. What Force does friction provide to this object?

Question 4 0.83 pts Which one of the following characteristics is not required to conduct an independent-samples t test? a. The observations from the two samples must be independent. b. The number of groups needs to be two. c. Two samples are randomly selected from two populations. d. The two samples have equal variances.

Consider the function f(x)= x if x<1 1 if 1 ≤ x ≤ 3 -4x+13 if x>3 Sketch a graph of y=f(x) use the graph to evaluate the definite integral ∫-2^5 f(x) dx

Question 5 2 pts Consider the emission spectrum for the element neon ( Ne ). If the amount of energy imparted to the Ne sample is increased: The positions of the emission lines present will shift to longer wavelengths. The positions of the emission lines present will change randomly. The positions of the emission lines present will shift to shorter wavelengths. The positions of the emission lines present will not change. The emission lines will disappear.

A 17. An 72 kg man is lifted by a helicopter 15 m vertically by a cable. a=9 / 10. How much work is done by: a) The force from the helicopter?

Which physical form of matter is the most easily compressed? liquid mixture of two solids solid gas mixture of gas and liquid

Homework 7 Begin Date: 10/22/2024 12:01:00 AM Due Date: 11/1/2024 11:59:00 PM End Date: 12/6/2024 11:59:00 PM Problem 9: ( 10% of Assignment Value) Consider two cylindrical objects of the same mass and radius. Object A is a solid cylinder, whereas object B is a hollow cylinder. - Part (a) If these objects roll without slipping down a ramp, which one will reach the bottom of the ramp first? Object A Correct! Part (b) How fast, in meters per second, is object A moving at the end of the ramp if its mass is 330 g, its radius 33 cm, and the height of the beginning of the ramp is 13.5 cm? vA= Part (c) How fast, in meters per second, is object B moving at the end of the ramp if it rolls down the same ramp?

An elevator has a placard stating that the maximum capacity is 1690 lb-10 passengers. So, 10 adult male passengers can have a mean weight of up to 1690 / 10=169 pounds. If the elevator is loaded with 10 adult male passengers, find the probability that it is overloaded because they have a mean weight greater than 169 lb. (Assume that weights of males are normally distributed with a mean of 177 lb and a standard deviation of 31 lb.) Does this elevator appear to be safe? The probability the elevator is overloaded is (Round to four decimal places as needed.)

The Stress-Strain Diagram 1 of 3 Review Rank the curves based on the elastic modulus of the materials represented. Rank the curves from highest to lowest modulus. To rank items as equivalent, overlap them. Learning Goal: To identify the properties of a material from a stress-strain curve and understand how those properties are related to the deformation of a material due to load. A stress-strain diagram provides substantial information about a material's mechanical properties. The figure ( Figure 1) shows four conventional (or engineering) stressstrain curves that exhibit properties of engineering Figure 1 of 1 View Available Hint(s) Reset Help

An arrow is shot vertically upward at a rate of 220 ft / s. Use the projectile formula h=-16 t^2+v0 t to determine at what time(s), in seconds, the arrow is at a height of 400 ft. Round your answer(s) to the nearest tenth of a second.

Which of the following statements is consistent with Boyle's Law concerning an ideal gas? At constant temperature and moles, a plot of volume versus pressure is linear. At constant pressure and volume, a plot of temperature versus moles is linear. At constant pressure and moles, a plot of temperature versus volume is linear. At constant temperature and moles, a plot of pressure versus the inverse of volume is linear. At constant temperature and pressure, a plot of moles versus volume is linear. - Your answer is incorrect.

Newton: Hey did you notice that the 100 Kg cube is the one that needs the biggest force to reach the target? Why is that? a) More massive objects have a smaller inertia b) It has a bigger volume c) There is no logical explanation d) More massive objects have a bigger inertia

Question 12 10 pts As more resistors, like a light bulb, are put into a parallel circuit, the overall resistance in the circuit: depends on the size of the resistors decreases stays the same increases

Consider a 290 g sample of water. How much energy is absorbed as the water is heated from 14.0°C to 90.0°C? Be sure each of your answer entries has the correct number of significant figures. Note: Reference the Phase change properties of pure substances and Conversion factors for non-SI units tables for additional information. Part 1 of 3 Report the energy absorbed in joules. J

In the US, the weight of a randomly selected adult male is normally distributed with a mean of 195 lbs and a standard deviation of 12 lbs. Let X be the weight of a randomly selected adult male and let S be the total weight of a random sample of size 12. 1. Describe the probability distribution of X and state its parameters μ and σ : X ~ Select an answer (μ=, σ=) and find the probability that the weight of a randomly selected adult male is more than 196 lbs. (Round the answer to 4 decimal places) 2. Use the Central Limit Theorem Select an answer to describe the probability distribution of S and state its parameters μS and σS : (Round the answers to 1 decimal place) S ~ Select an answer (μS=, σS=) and find the probability that the total weight of a sample of 12 randomly selected adult males is between 2354 and 2365 lbs. (Round the answer to 4 decimal places)

Which of the following causes the short-run aggregate supply curve to shift to the right? A. an increase in the expected price of an important natural resource B. a higher expected future price level C. a decrease in the capital stock D. a positive technological change Which of the following causes the short-run aggregate supply curve to shift to the left? A. an increase in the expected price of an important natural resource B. an increase in productivity C. an increase in the labor force D. a positive technological change

A mass of 2.00 kg connected to a spring of spring constant 500.0 N/m undergoes simple harmonic motion with an amplitude of 30.0 cm. What is the period of oscillation?

Find the reference angle for -555°.

Figure 16.1 Use the diagram above to answer the following questions. Identify the letter that indicates the structure that is the boundary between the external and middle ear. A B C D E

If the cylinder, shown below is 5.5 L big, has a pressure of 2.47 atm and the temperature in the room is 39°C, how many moles of gas are in the cylinder? (answer to 1/100 place X.XX)

What is the volume of gas (in L) at 550 mmHg? Be sure your answer has the correct number of significant figures.

Question 1 of 5 Write the number 0.00000024 using scientific notation.

A gas has a volume of 36.0 L and a pressure of 750 torr when the temperature is 10 °C. What is the pressure if the volume changes to 15.0 L and the temperature changes to 78°C, if the amount of gas stays the same? Express your answer using three significant figures.

A motor is a three-phase motor that runs at a constant speed, independent of the load connected to it.

A 57.0 g tennis ball is thrown with a speed of 35.0 m/s at a 7.3 kg bowling ball that is moving at a speed of 1.0 m/s towards the tennis ball. The two collide and the tennis ball bounces back in the opposite direction as it previously moving at a speed of 20.0 m/s. Determine the speed of the bowling ball after the collision. Was the collision elastic, inelastic, or completely inelastic?

Two independent remote water level indicators are often installed on very high pressure boilers.

Which of the following gas samples would have the largest volume, if all samples are at the same temperature and pressure? 65.7 grams of Xe 9 × 10^23 molecules of H2 5.00 moles CO2 they would all have the same volume

Rank the objects according to acceleration; use 1 for the most negative and 4 for the most positive. Directions: Tap each diagram in order to toggle though the possible acceleration rankings. Once each object has a unique ranking, a Check Answer button will appear. 2 4 N ⟵ 0.25 4 N ⟵ 0 kg

A roller coaster is at the top of a 72 m hill and weighs 966 N. At the top of the hill the coaster car has energy. Calculate it.

A ramp in a skate park can be modelled by a piecewise linear function. Each section of the ramp is a straight line, and the coordinates (measured in metres) of the endpoints of the sections are shown. The middle section of the ramp is horizontal. The formula for this piecewise linear function is given by f(x) = mx for 0 ≤ x ≤ k l for k ≤ x ≤ 5 px+q for 5 ≤ x ≤ r Find the values of: 1. m 2. l 3. k 4. a 5. b 6. p 7. q 8. r.

=-3 e^x cdot e^x

Choose the correct statement. The overall result of the proton-proton chain is that two protons becomes two hydrogen nuclel and energy. The overall result of the proton-proton chain is that four hydrogen nuclel become 1 heflum nueleus and energy. The overall result of the proton-proton chain is individual protons are joined into long chains of protons. The overall result of the proton-proton chain is slx hydrogen nuelel become one hellum nucleus and energy.

Question 21 of 25 Click to download the data in your preferred format. CSV Excel JMP Mac-Text Minitab PC-Text R SPSS TI CrunchIt! Make a scatterplot using year as the explanatory variable and temperature as the response variable. The least-squares regression line is temperature = -7.8 + (0.0111 × year) What would you predict for the annual average temperature for 2014 based on this line? Report your answer in degrees to two decimal places. temperature = 14.56 - Celsius The predicted temperature from the least-squares regression equation for 2014 is within 0.05 degrees of the actual temperature. The correlation between these variables is r=0.675. What percentage of the variation in temperature can be explained by the straight-line dependence on year? Round your answer to the nearest whole percent.

What is the phase angle of an AC series circuit that is constructed of a 10.0-Ω resistor along with 12.00 Ω inductive reactance and 7.00 Ω capacitive reactance? a. 26.6° b. 18.4° c. 87.0° d. 63.4°

Solve y''+5y'+4y=0, y(0)=4, y'(0)=-19 y(t)=

Graph the line with the given slope m and y-intercept b. m=2/3, b=-3

Diagonalize the following matrix, if possible. [ [8 -3 3 2] ]

A microscope is used to view objects that are too small to be seen by the naked eye. How would you calculate total magnification using the chart below (fill in the blanks)? Powers Objective Lens Eye Piece Magnification -------------------------------------------------- Scanning 4 × 10 × Low 10 × 10 × High 40 × 10 × Oil 100 × 10 ×

Select all of the following that are true of instantaneous angular acceleration. The rate of change of an object's angular velocity is its instantaneous angular acceleration.

Let the graph of g be a translation 2 units up and 2 units right, followed by a reflection in the y-axis of the graph of f(x)=-(x+3)^2-2. Write a rule for g.

Find the direction of the resultant ant vector. θ=[?]° Round to the nearest hundredth.

surrounding host rock, the latter is older, as are any inclusions of the host rock found in the intrusion. The following illustration depicts an area and its underlying geology. Three points in time are depicted. - Time A: An igneous rock exists underground. - Time B: The ground surface is eroded, which exposes the igneous rock. - Time C: Layers of sedimentary rock are formed atop of the igneous rock. Using the principle of inclusions, rank the labeled areas from oldest to youngest. B. Exposure and weathering of intrusive igneous rock C. Deposition of sedimentary layers

A bat strikes a ball. For these initial and final velocities, at what angle above the x axis is the average force exerted by the bat directed? A. 90° B. 56° C. 0° D. 45° E. 34°

Suppose the standard deviation of the ages of all Florida panthers is 13.7 years. Let x̄ be the mean age for a sample of a certain number of Florida panthers. What sample size will give the standard deviation of x̄ equal to 0.8 years? Round the solution up to the nearest whole number, if necessary. n = □

The primary motor area (cortex) send signals to which of following that ultimately results in muscle contractions? Cerebellum and temporal lobe Spinal cord and limbic system Primary visual area Brainstem and spinal cord

Motion Sensor A cart of mass m is pulled along a level dynamics track as shown above. A force sensor is attached to the cart with a string and used to measure the horizontal force exerted on the cart to the right. A motion sensor is used to measure the acceleration of the cart with the positive direction toward the right. Friction is not negligible. a. On the dot below, which represents the cart, draw and label the forces (not components) that act on the cart. Each force must be represented by a distinct arrow starting on, and pointing away from, the dot. A student pulls the force sensor with a constant force, and the cart accelerates. This is repeated for several trials, with a different constant force used for each trial. The data are recorded in the table below. Trial 1 2 3 4 5 Force sensor reading (N) 0.32 0.38 0.44 0.50 0.60 Acceleration (m / s^2) 0.12 0.22 0.33 0.50 0.70 b. i. On the grid below, plot data points for the acceleration of the cart as a function of the force sensor reading. Clearly scale all axes. Draw a straight line that best represents the data.

1. A bicyclist pedaling up a hill P 3. A volleyball player spiking a ball K 2. An archer with his bow drawn P 5. The chemical bonds in sugar P 4. A baseball thrown to second base K 6. The wind blowing through your hair K 7. Walking down the street K 8. Sitting in the top of a tree P 9. A bowling ball rolling down the alley K 10. A bowling ball sitting on the rack P

Question 3 of 8, Step 3 of 3 4 / 12 Correct Consider the function f(x)= x^2+8x+22 if x<-4 2x+14 if x ≥ -4 Step 3 of 3: Find the limit as x approaches -4 of f(x).

How many times greater is the force exerted by the sun on the moon then the force exerted by the earth on the moon?

The humidity over the Great Basin of the Western United States is typically low due to the moisture of the Pacific Ocean getting trapped in the Sierra Mountains. This is called downslope warming and drying.

Find the circumference and area of the circle. Express answers in terms of π and then round to the nearest tenth. Find the circumference in terms of π C= (Type an exact answer in terms of π.) Find the circumference rounded to the nearest tenth. C= Find the area in terms of π A= (Type an exact answer in terms of π.) Find the area rounded to the nearest tenth. A=

reflection across l₁ rotation of 45° counterclockwise rotation of 270° counterclockwise reflection across l₂

Find the equation for the tangent plane to the surface z=e^(2x^2+3y^2) at the point (0,0,1). z=0 z=1 z=2 z=-1

Calculate the energy and wavelength associated with a photon of light that has a frequency of 4.02 × 10^13 s^-1. E=hc / K E=ho h=6.626 × 10^-34 Js

Find the derivative of the function. f(t)=cos^2(e^cos^2(t)) f'(t)=

Directional derivative: Problem 4 (1 point) The figure below shows some level curves of a differentiable function f(x, y). Based only on the information in the figure, estimate the directional derivative: fu(3,3) where u=(-i-j) / sqrt(2) fu(3,3) ≈ 0 (Hint to obtain the best estimate, find the average rate of change over equal increments in the u and -u directions, then find the mean of these two estimates.)

1. (10 pts total). A supercell thunderstorm is defined as a convective storm that has a quasisteady, rotating updraft (mesocyclone). Both cyclonic and anti-cyclonic rotating supercells are physically possible. This is actually observed in nature, often early in the mesocyclogenesis process, when two opposing, rotating updrafts develop nearly simultaneously. Eventually, the convective storm splits into a "right-moving" or cyclonic supercell, and a "left-moving" or anticyclonic supercell. Typically, the left-mover dissipates fairly quickly while the right-mover becomes dominant. Answer the following questions concerning supercells. a.) ( 5 pts). What type of horizontal force balance applies in supercells? Using this, explain why both cyclonic and anti-cyclonic rotation is possible by using words, math (i.e., equations and sign analyses), and diagrams. b.) ( 5 pts ). Use the concept of vorticity tilting to explain how both cyclonic and anticyclonic rotation develops. Assume that horizontal winds increase with height (i.e., vertical wind shear), and the storm updraft is associated with a maximum in upward vertical motion (i.e., w increases across some horizontal distance approaching the updraft core and decreases moving away from the core). Answer this by using words, math, and diagrams.

Consider a fluid whose flow is constrained to be in the shape of a square, but the size of the square is free to expand and contract. This fluid is initially not moving and is located at 45° S. After some time, the tangential velocity measured along each 10-m side of the square is 25 m s^-1, and the circulation is in the cyclonic direction. What is the size of the initial square (length of one side)? Clearly state both assumptions required to answer this question.

Find the wavelength of a radio wave whose frequency is 1.02 × 10^11 Hz.

Potential energy is

Halle los puntos de la superficie; x^2 + 4y^2 + 16z^2 - 2xy = 12 tal que los planos tangenciales a la superficie sean paralelos al plano XZ.

Define T: P2 → R^2 by T(p)=[p(0) p(1)]. For instance, if p(t)=3+5t+7t^2, then T(p)=[3 15]. a. Show that T is a linear transformation. [Hint: For arbitrary polynomials p, q in P2, compute T(p+q) and T(p).] b. Find a polynomial p in P2 that spans the kernel of T, and describe the range of T.

R3. The battery supplies a constant voltage Vb, and the resistors are labeled with their resistances. The ammeters are ideal meters that read I1 and I2 respectively. The direction of each loop and the direction of each current arrow that you draw on your own circuits are arbitrary. Just assign voltage drops consistently and sum both voltage drops and currents algebraically and you will get correct equations. If the actual current is in the opposite direction from your current arrow, your answer for that current will be negative. The direction of any loop is even less important The equation obtained from a counterclockwise loop is the same as that from a clockwise loop except for a negative sign in front of every term (i.e., an inconsequential change in overall sign of the equation because it equals zero). Apply the junction rule to the junction labeled with the number 1 (at the bottom of the resistor of resistance R2). Answer in terms of given quantities, together with the meter readings I1 and I2 and the current I3. Sigma I=0=I3+I2-I1 You have indicated that I1 and I2 flow into the junction and I3 flows out. Is this what the diagram shows? If you apply the junction rule to the junction above R2, you should find that the expression you get is equivalent to what you just obtained for the junction labeled 1. Obviously the conservation of charge or current flow enforces the same relationship among the currents when they separate as when they recombine. Apply the loop rule to loop 2 (the smaller loop on the right). Sum the voltage changes across each circuit element around this loop going in the direction of the arrow. Remember that the current meter is ideal. Express the voltage drops in terms of Vb, I2, I3, the given resistances, and any other given quantities.

QUESTION 18 Graph the region described by the inequality. 2 x+y ≤ -1

Which of the following statements about the Crab Nebula is FALSE? Please select the best choice from the available options. the neutron star inside shows clear evidence of slowing down just a little bit in its rotation we can detect a pulsar inside the nebula using both radio waves and visible light the nebula still puts out more energy (at all wavelengths) than 100,000 Suns it is the remnant of a supernova explosion first seen on Earth in 1054 AD inside, there are a number of newly formed massive stars (O and B type stars)

A lamppost is located 152 yards from a building. The angle of elevation from the base of the lamppost to the top of the building is 33.4 degrees. Approximately how tall is the building?

A person travels 75.0 m with a final velocity of 10.0 m / s over 10.0 s. What is the person's acceleration? a=[?] m / s^2

Name the quadrant and reference angle (in radians) for the angle 26π/7. Quadrant: Reference angle:

Systems of Linear Equations Graphing a linear inequality in the plane: Slope-Intercept form Graph the inequality: y ≤ (1/3)x + 2

Series or Parallel Circuit? 2. In the circuit diagram below, the battery has an EMF of 3 V and all the resistors have a resistance of 2 Ω. a. How are they connected (series, parallel, or neither)? Redraw the circuit below to make the connections clearer. b. What is the total resistance of the circuit? c. What is the current put out by the battery? d. What is the power put out by the battery?

A baseball diamond is a square, 94.0 ft on a side, with home plate and the three bases as vertices. The pitcher's position is 62.5 ft from home plate. Find the distance from the pitcher's position to each of the bases. The distance from the pitcher's position to 1st base, 2nd base, and 3rd base is (Round to the nearest tenth as needed.) ft, ft, and ft.

25. What is the largest particle that can generally be transported by a stream that is moving at 200 centimeters per second? A) sand C) cobble B) pebble D) boulder

Evaluate ( frac5 xy^2 ) for each of the following combinations: - ( x=-2, y=-4 ) - ( x=-0, y=-4 ) - ( x=-4, y=0 )

A mechanic changing the spark plugs in a car notes that the instruction manual calls for a torque with a magnitude of 43 N . m . If the mechanic grasps the wrench as shown in the figure below, determine the magnitude (in N ) of the force she must exert on the wrench.

The number of dark spots that appear on the Sun, known as sunspots, can vary greatly. For example, there were about 180 sunspots in November 2001. there were only about 2 sunspots in December 2008. Which choice completes the text with the most logical transition? Choose 1 answer: (A) In other words, (B) Similarly, (C) Therefore, (D) By comparison,

Child goes down an 8 meter slide at an angle of 30°. The coefficient of kinetic friction is 0.35. If the child starts from rest, what is his speed when he reaches the bottom of the slide?

Joe has just dropped your purse from an open window 120 feet off the ground. There is no velocity since gravity is pulling the object to the ground. The equation to model this situation is h = -16 t^2 + 120. When does the purse hit the sidewalk below the window? (hundredths) What is the starting height? What is the maximum height? Show work and label your answers. Show location of answers on the graph. Label axes with correct variable and name.

sin R= cos R= tan R=

Method of Sections 1. The given truss members have equal lengths. Assume that the force at B, E, and D has the magnitude of FB=10 kN, FE=20 kN, and FD=30 kN, respectively. (a) Draw a free-body diagram for the truss. (b) Use the diagram to calculate the reaction forces at A and C. (c) Use the method of sections to compute the forces in the members of the truss AB, BE, and ED. (d) Identify which force in the members of the truss is a compression or a tension.

Projectile Motion Review I. Motion Parameters Indicate which direction (x or y) corresponds to the motion parameter 1. Time graph of (x, y) is a diagonal line 2. Time graph of (x, y) is a curve 3. Time graph of (vx, vy) is a straight diagonal line 4. Time graph of (vx, vy) is a straight horizontal line 5. Time graph of (ax, ay) is a straight horizontal line at 0 6. Time graph of (ax, ay) is a straight horizontal line at -10 II. Horizontal Launch: A marble rolls off of a table and lands 0.3 seconds later at an x-distance of 4 m. 7. Calculate the Vx 8. Calculate table height 9. Draw a labelled vector diagram for the landing. 10. Calculate the angle of impact. III. Angular Launch: A ball is kicked at 15 m/s at angle of 10 degrees above the ground. 11. Draw a labelled vector diagram for the kick. 12-13. Calculate Vxi and Vyi. 14. Calculate hmax 15. Calculate maximum range

The formula for AVC is A. (Δq)/(ΔTVC). B. (q)/(TVC). c. (ΔTVC)/(Δq). D. (TVC)/(q).

Use L'Hôpital's Rule to evaluate lim x → ∞ (x^2 / e^(7x))

Question Which of the following functions will have an oblique asymptote? Select the correct answer below: f(x) = (-2x - 1)(2x + 1) / (5x^2 + x - 4) g(x) = (2 - 8x) / ((3 - 2x)(2x + 3)) h(x) = (-2x - 1)(x^2 - 2) / (2x^2 + 1) p(x) = (1 - 3x) / ((-x - 2)(2x + 2))

Determine whether the following planes below are parallel, perpendicular, or neither. choose one 1. x+2y-6z=0 and -3x-6y+18z=-3. choose one 2. x-3y+z=0 and -x-2y+z=5. choose one 3. x+9z=0 and 9x-z=1. Note: You only have two attempts at this problem.

Find the value of tan θ if the point P lies on the terminal side of θ. P(3,-4) a. -4/3 b. 4/3 c. -3/4 d. 3/4

Consider the following. [ w=x y z, quad x=s+4 t, quad y=s-4 t, quad z=s t^2 ] (a) Find (fracpartial wpartial s) and (fracpartial wpartial t) by using the appropriate Chain Rule. (Enter your answers in terms of (s) and (t).) [ fracpartial wpartial s=square ] [ fracpartial wpartial t=square ]

Is the graph of this equation a horizontal or vertical line? y = -5 horizontal line vertical line

Multiple Choice Question A new or considerably changed service concept is referred to as a service Need help? Review these concept resources. Read about the concept "New service concept" ○ offering ○ innovation ○ product ○ breakthrough

When a golfer tees off, the head of her golf club which has a mass of 158 g is traveling 43.6 m/s just before it strikes a 46.0 g golf ball at rest on a tee. Immediately after the collision, the club head continues to travel in the same direction but at a reduced speed of 25.0 m/s. Neglect the mass of the club handle and determine the speed of the golf ball just after impact.

Rotate the vector ⟨-3,5⟩ 270° clockwise about the origin. ⟨-5,[?]⟩

The figure shows a 16.9-kg, uniform ladder of length L hinged to a horizontal platform at point P1 and anchored with a steel cable attached at the ladder's midpoint. The angle alpha between the ladder and the floor is 50.0 degrees, and the angle theta between the cable and the floor is 300 degrees. Calculate the tension in the cable when a 80.9-kg person is standing three-quarters of the way up the ladder. N

Let A= [[9, -4], [-3, -8]] Find -2 A -2 A=

The energy of an object is given by E=mg h + 1/2 m(dh/dt)^2 where m is the (constant) mass of the object, g is constant, and h is the height of the object. If the energy of the object is increasing at a rate of 50 ft. lbs. / sec, find the acceleration of the object the instant its velocity is 10 ft / sec.

When you throw a pebble straight up with initial speed V, it reaches a maximum height H with no air resistance. At what speed should you throw it up vertically so it will go twice as high? A) 4 V B) 8 V C) sqrt(2) V D) 2 V E) 16 V

The units are given for y and for f(x). Give the units of the integral from a to b of f(x) dx. x is a portion in "feet" and f(x) is an area in "square feet."

What is the resolution of the hand dial on the table of a vertical milling machine? Multiple Choice (select the best answer) 0.0001 inches 0.001 inches 0.010 inches 0.100 inches What is the distance the table must move to align the center of the spindle with the edge of the workpiece when using a edge finder with a diameter of 0.200 inches? Multiple Choice (select the best answer) 0.100 inches 0.200 inches 0.020 inches

Question 15° 2 Points Usually consisting of a triad or larger, a temporary or permanent alliance geared toward a common goal is a A secondary group (B) coalition (C) groupthink (D) dyad

Calculating Work Practice - CK dinatructure.com/courses/459624/assignments/113356357moduleitemid-25454200 Clarissa helps her mom put the 200-newton lawn mower in the pack of her mom's truck. They lift the mower up from the ground to the truck bed, which is 1.1 meters above the ground. How much work do Clarissa and her mom do? a 240 J b 140 J Need a Hint? c 220 J d 180 J

A certain shade of blue has a frequency of 7.23 × 10^14 Hz. What is the energy of exactly one photon of this light? Planck's

You stand on a frictional platform that is rotating at 1.3 rev / s. Your arms are outstretched, and you hold a heavy weight in each hand. The moment of inertia of you, the extended weights, and the platform is 9.6 kg * m^2. When you pull the weights in toward your body, the moment of inertia decreases to 5.4 kg * m^2. What is the resulting angular speed ωf of the platform? ωf= rev/s What is the change in kinetic energy ΔK of the system? ΔK= J Where did this increase in energy come from? - kinetic energy of the platform - gravity - air resistance - your internal energy - mass of the weights

Dimensional analysis

Where does hydrogen fusion take place in a red giant star? A shell around the core There is no hydrogen fusion in a red giant star Throughout the entire structure evenly On the surface Inside the core Question 5 2 pts When a white dwarf star accretes material from a binary companion, re-ignites nuclear fusion, and explodes, what phenomenon do we observe? Nova HII Region Brown Dwarf Black Hole Nucleosynthesis

The graph of which inequality is shown? A. x+y ≤ -1 B. x+y ≥ -1 C. x-y ≤ -1 D. x-y ≥ -1

The figure shows a rigid structure consisting of a circular hoop of radius R and mass m, and a square made of four thin bars, each of length R and mass m. The rigid structure rotates at a constant speed about a vertical axis, with a period of rotation of 4.1 s. If R=1.3 m and m=1.2 kg, calculate the angular momentum about that axis.

The car lift in a gas station operates with an air pressure of 2,000 kPa. The piston of the car lift has a diameter of 30.0 cm. What is the m

Alonzo works for NASA designing planetary rovers. For his current project, he has to design a rover capable of withstanding the harsh climate on the surface of Venus. As part of his design work, Alonzo models the daily high surface temperature of Venus using a normal distribution with a mean of 468°C and a standard deviation of 30°C. Use this table or the ALEKS calculator to find the percentage of daily high temperatures between 444°C and 486°C according to the model. For your intermediate computations, use four or more decimal places. Give your final answer to two decimal places (for example 98.23%).

An engineer wants to determine how the weight of a gas-powered car, x, affects gas mileage, y. The accompanying data represent the weights of various domestic cars and ti gallon in the city for the most recent model year. Complete parts (a) through (d) below. (c) A certain gas-powered car weighs 3640 pounds and gets 17 miles per gallon. Is the miles per gallon of this car above average or below average for cars of this weight? The estimated average miles per gallon for cars of this weight is miles per gallon. The miles per gallon of this car is average for cars of this weight. (Round to three decimal places as needed.) (d) Would it be reasonable to use the least-squares regression line to predict the miles per gallon of a hybrid gas and electric car? Why or why not? A. No, because the hybrid is a different type of car. B. Yes, because the hybrid is partially powered by gas. C. Yes, because the absolute value of the correlation coefficient is greater than the critical value for a sample size of n=10. D. No, because the absolute value of the correlation coefficient is less than the critical value for a sample size of n=10.

mylab.pearson.com Question 12, 6.2-39-T Part 1 of 3 Let σ be the population standard deviation and let n be the sample size. Which distribution should be used to construct the confidence interval? t should be used to construct the confidence interval, since Clear all Check answer command option

A person x inches tall has a pulse rate of y beats per minute, as given approximately by y=576 x^(-1 / 3) for 30 ≤ x ≤ 75. What is the instantaneous rate of change of pulse rate for the following heights? (A) 47-inches (B) 71-inches What is the instantaneous rate of change of pulse rate for a 47 inch tall person? beats per minute per inch (Round to the nearest hundredth as needed.) What is the instantaneous rate of change of pulse rate for a 71 inch tall person? beats per minute per inch (Round to the nearest hundredth as needed.)

Part 1 (1 point) How did Wegener use this map to justify his continental-drift hypothesis? Choose one: A. Wegener speculated that the distribution of late-Paleozoic sedimentary environments defined climate belts on Pangaea and therefore the position of the continents. B. Wegener concluded that the direction of the glacial striations showed the direction the continents moved as Pangaea broke apart. C. Wegener said these environments occurred at different latitudes than where they occur today. D. Wegener suggested these areas have the same climate today. Part 2 (1 point) Can the pattern of glacial striations be explained if continents have always been in their present-day locations? Choose one: A. No, because glacial ice moves toward coastlines, as many of the striations indicate, not toward the middle of continents. B. Yes, because glacial ice currently exists on many of these landmasses. C. No, because the glacial striations are not in agreement if there was a supercontinent D. Yes, because the entire southern hemisphere was covered in ice sheets.

Multiple Choice Question If you study the way people move their bodies, you are studying physiology. anatomy. kinesics. etymology.

Fifty-four wild bears were anesthetized, and then their weights and chest sizes were measured and listed in a data set. Results are shown in the accompanying display. Is there sufficient evidence to support the claim that there is a linear correlation between the weights of bears and their chest sizes? When measuring an anesthetized bear, is it easier to measure chest size than weight? If so, does it appear that a measured chest size can be used to predict the weight? Use a significance level of α=0.05. Determine the null and alternative hypotheses. H0: p=□ H1: ρ> Identify the correlation coefficient, r. r= □ Identify the critical value(s). A. There are two critical values at r= ± □ B. There is one critical value at r= □ Is there sufficient evidence to support the claim that there is a linear correlation between the weights of bears and their chest sizes? Choose the correct answer below and, if necessary, fill in the answer box within your choice. A. Yes, because the correlation coefficient □ falls outside the critical value(s). B. No, because the correlation coefficient □ falls outside the critical value(s). C. No, because the correlation coefficient □ falls between the critical values. D. Yes, because the correlation coefficient □ falls between the critical values. E. The answer cannot be determined from the given information. When measuring an anesthetized bear, is it easier to measure chest size than weight? If so, does it appear that a measured chest size can be used to predict the weight? A. Yes, it is easier to measure a chest size than a weight because measuring weight would require lifting the bear onto the scale. The chest size could not be used to predict weight because there is not a linear correlation between the two. B. Yes, it is easier to measure a chest size than a weight because measuring weight would require lifting the bear onto the scale. The chest size could be used to predict weight because there is a linear correlation between the two. C. No, it is easier to measure weight than chest size because the chest is not a flat surface. D. Yes, it is easier to measure a chest size than a weight because measuring weight would require lifting the bear onto the scale. The chest size could not be used to predict weight because there is too much variance in the weight of the bears.

System 1 and System 2 refer to two kinds of deliberation, two kinds of thinking, two kinds of groups in systems theory, two kinds of heuristics.

A random sample of male systolic blood pressure values is given below. Generate the normal quantile plot for this data set and determine whether or not the data come from a normally distributed population. 90 120 150 Do the data appear to come from a normally distributed population? A. Yes, but the points in the normal quantile plot do not lie reasonably close to a straight line or show a systematic pattern that is a straight line pattern. B. No, because the points in the normal quantile plot do not lie reasonably close to a straight line or show a systematic pattern that is a straight line pattern. C. No, but the points in the normal quantile plot lie reasonably close to a straight line and show some systematic pattern that is a straight line pattern. D. Yes, because the pattern of the points in the normal quantile plot is reasonably close to a straight line.

Evaluate the following square root expression. (-i)^10 sqrt-169

A bicycle pump is sealed at one end and the piston pushed until the pressure of the trapped air increases to 4.00 x 10^3 Pa. The area of the piston compressing the air is 5.00 x 10^-4 m^2. The force that the trapped air exerts on the piston is A 1.25 x 10^-9 N B 8.00 x 10^-1 N C 2.00 x 10^2 N D 8.00 x 10^8 N E 2.00 x 10^10 N.

Write 75 as a product of prime factors.

Un tanque abierto al aire completamente lleno de agua tiene una válvula de alivio cerca del fondo. La válvula se encuentra 1.0 m debajo de la superficie del agua. Se libera el agua de la válvula para impulsar una turbina, la cual genera electricidad. El área en la parte superior del tanque, AT, es 10 veces el área de sección transversal, AV, de la abertura de la válvula. Calcule la velocidad del agua conforme sale de la válvula. Ignore la fricción y la viscosidad. Además, calcule la velocidad de una gota de agua soltada a partir del reposo desde h=1.0 m cuando alcanzá la elevación de la válvula. Compare las dos velocidades. Vtext valbula =quad mathrmm / mathrms, Vtext gota =quad mathrmm / mathrms.

You decide it is time to remove a stump from your front garden. So you dig out around it with a shovel, pry it out using a 2'' × 4° stud balanced on a brick, and haul away in a wheelbarrow. Of those different motions, which would be considered the third-class lever? - The removal of the stump using the wheelbarrow. - The motion using the 2^-1 × 4'' stud to pry it out - The shovel motion of digging around the stump is considered a third-class lever - None of these motions is considered a third-class lever

The function f(x)= 4-x^2 x leq 1 m x+b x>1 is continuous and differentiable for all real numbers. What must be the values of m and b?

Pentagon G' H' I' J' K' is the image of pentagon GHIJK under a rotation about the origin followed by a translation. Write the rules for the rotation and translation. Rotation: (x, y) →(, Translation: (x, y) →()

Find the intervals on which the graph of f is concave upward, the intervals on which the graph of f is concave downward, and the inflection points. f(x) = x^16 + 7x^2 For what interval(s) of x is the graph of f concave upward? Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. (-∞, ∞) (Type your answer in interval notation. Type an exact answer. Use a comma to separate answers as needed.) B. The graph is never concave upward. For what interval(s) of x is the graph of f concave downward? Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. (Type your answer in interval notation. Type an exact answer. Use a comma to separate answers as needed.) B. The graph is never concave downward.

To estimate the height of a stone figure, an observer holds a small square up to her eyes and walks backward from the figure. She stops when the bottom of the figure aligns with the bottom edge of the square, and when the top of the figure aligns with the top edge of the square. Her eye level is 1.81 m from the ground. She is 4.20 m from the figure. What is the height of the figure to the nearest hundredth of a meter? The height of the figure is approximately m . (Type an integer or decimal rounded to the nearest hundredth as needed.)

Question 3 (1 point) Do you think it would be appropriate to use interpolation to find the distance at 7 or 9 minutes? Yes, they fall outside of the data points we have. No, they fall outside of the data points we have. Yes, they fall within the data points we have. No, they fall within the data points we have.

Evaluate the limit lim as x approaches 0 of (sin 4x)/(9x)

An object of mass m=5.21 kg is on the θ=32.5° incline plane with unknown applied force FA. Static friction coefficient of plane is μs=0.395 and kinetic friction coefficient of the plane μk=0.316. a) Consider object moving up with an acceleration of a=1.2 m / s^2. II. Find an algebraic equation for applied force and its numerical value?

Calculate the wavelength, in nanometers, of the spectral line produced when an electron in a hydrogen atom undergoes the transition from the energy level n=7 to the level n=1. λ= nm

Sketch the graph of the rational function. y = 1 / (x + 9)

Trucks in a delivery fleet travel a mean of 100 miles per day with a standard deviation of 38 miles per day. The mileage per day is distributed normally. Find the probability that a truck drives between 119 and 149 miles in a day. Round your answer to four decimal places.

What gas law uses the following equation: PT=P1+P2+P3+…

Graph the following function: y=3 sec (1/2(x+3π/4))+1

A baseball pitcher's fastballs have been clocked at about 94 mph (1 mile = 1609 m). Part 1 of 2 Calculate the wavelength of a 0.145 kg baseball at this speed. Be sure your answer has the correct number of significant digits. Part 2 of 2 What is the wavelength of a hydrogen atom at the same speed? Be sure your answer has the correct number of significant digits.

12. Why can an induction motor never operate at synchronous speed?

The activities buyers and sellers perform to facilitate mutually satisfying exchanges is termed

Sabiendo que la gravedad en un planeta es 1.31 m / s^2, ¿Cuál será la velocidad con la que llega al suelo un cuerpo de 700 g de masa que se deja caer libremente desde una altura de 30 m?

A stone pyramid in Egypt has a square base that measures 148 m on each side. The height is 93 m. What is the volume of the pyramid? m^3 Round your answer to the nearest tenth if necessary.

A bowling ball (mass = 5.6 kg, radius = 0.11 m) and a billiard ball (mass = 0.36 kg, radius = 0.028 m) may each be treated as uniform spheres. What is the magnitude of the maximum gravitational force that each can exert on the other? Number i Units

Question 25 1 pts Compared with the current in the primary coil of a transformer, the current in the secondary coil is less. can be greater or less. is greater. none of the above

To test H0: μ=100 versus H1: μ ≠ 100, a simple random sample of size n=24 is obtained from a population that is known to be normally distributed. Answer parts (a)-(e). (c) Draw a t-distribution that depicts the critical region(s). Which of the following graphs shows the critical region(s) in the t-distribution? A. B. C. (d) Will the researcher reject the null hypothesis? A. The researcher will reject the null hypothesis since the test statistic is not in the rejection region. B. The researcher will reject the null hypothesis since the test statistic is in the rejection region. C. There is not sufficient evidence for the researcher to reject the null hypothesis since the test statistic is not in the rejection region. D. There is not sufficient evidence for the researcher to reject the null hypothesis since the test statistic is in the rejection region. (e) Construct a 99% confidence interval to test the hypothesis. The confidence interval is ( ). (Round to two decimal places as needed.)

Question 116 1 pts To totally convert a given amount of mechanical energy into heat is possible. need more information. none of these. impossible. (1)

Question 103 1 pts The cooling effect inside a refrigerator is produced by an electric motor that converts electrical energy to internal energy. compressing the refrigeration gas. vaporizing the refrigeration liquid. proper insulation. exchanging warmer air with colder air.

Identify the characteristics of a noninverting amplifier. An inductor is connected in parallel with the feedback resistor. The feedback resistor is connected between the output and the inverting input. The input voltage is applied at the noninverting terminal. A resistor is connected between the ground and the inverting terminal.

If you were explaining Boyle's law to a friend who does not understand it, you would likely make all of the following points except a. A decrease in the volume of a container raises the pressure in the reduced space. b. Pressure and volume are inversely related. c. An increase in the volume of a container lowers the pressure of the air inside. d. An increase in the volume of a container raises the pressure of the air inside.

Find the slope of the line tangent to the polar curve r=4 sec^2 theta at the point theta=-3π/4. Write the exact answer. Do not round.

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