Physics Homework Questions & Answers Archive

Consider the arrangement of point charges in the figure. Part (a) Determine the direction of the force on q (with q>0 ) in the figure, given that qd=qb=+7.50 μC and qc=qd=-7.50 μC. Straight downward Correct! Part (b) Calculate the magnitude of the force on the charge q in newtons, given that the square is 13 cm on a side and q=1.25 μC. F=0.00111

Properties of Sound Waves Factors Affecting Intensity Use the drop-down menus to complete each statement. When the amplitude of a wave triples, the intensity changes by a factor of When the amplitude of a wave is cut in half, the intensity changes by a factor of When the distance between the source and your ear is ten times farther away, the intensity changes by a factor of When the distance between the source and your ear is reduced by 1 / 3, the intensity changes by a factor of

The graph below shows a rough approximation of what's known as a "flash crash" in the price of the month gold futures on a particular day. Note that t is in hours and p(t) is in dollars. (You can click on a graph to enlarge it.) Evaluate the following. Enter DNE if a limit does not exist or a value is undefined. a. The limit as x approaches 140 of p(t) = 1700 b. The limit as 1 of p(t) = 1800

A tennis ball is tossed upward, and its heights at various times are recorded. Let f(t) be the height (in feet) of the tennis ball at t seconds. Complete parts a through e. Time (seconds) Height (feet) 0.00 1.93 0.06 2.36 0.12 2.49 0.18 2.64 0.24 2.65 0.30 2.60 0.36 2.46 a. Find an equation of f. Choose the correct answer below. A. f(t)=-13.33 t^2+8.13 t-8.03 B. f(t)=-13.33 t^2+6.13 t+1.97 C. f(t)=13.33 t+8.13 D. f(t)=6.13(-8.03)^t

a. Use the definition (mtan =lim h rightarrow 0 fracf(a+h)-f(a)h) to find the slope of the line tangent to the graph of (f) at (P). b. Determine an equation of the tangent line at (P). (f(x)=sqrtx+99, P(1,10)) a. (mtan =) (Simplify your answer. Type an exact answer, using radicals as needed.)

Radioactive decay and energy left over from the formation of the planet provide Earth with an internal source of

Use the definition (mtan =lim h rightarrow 0 fracf(a+h)-f(a)h) to find the slope of the line tangent to the graph of (f) at (P). Determine an equation of the tangent line at (P). (f(x)=7+4 x^2 ; P(0,7)) (mtan =) (square) (Type an integer or a fraction.)

JNUSUAL ATTITUDES / INSTRUMENT FAILURE Recovering From Unusual Attitudes Previously Unanswered Select the true statement(s). If you find yourself in a nose-high unusual attitude the correct procedure is to level the wings prior to lowering the nose. If you find yourself in a nose-high unusual attitude the correct procedure is to lower the nose prior to leveling the wings. If you find yourself in a nose-high unusual attitude the correct procedure is to increase power prior to lowering the nose.

Lee is rolling along on her 4-kg skateboard at a speed of 3 m/s when she jumps off the back and continues forward with a velocity of 2 m/s relative to the ground. This causes the skateboard to go flying forward with a speed of 15.5 m/s relative to the ground. What is Lee's mass?

If a photon has energy of 3.74 × 10^-26 J, what is the wavelength of this photons in meters? h=6.626 × 10^-34 Js

Use transformations of the graph of (f(x)=4^x) to graph the given function. Be sure to graph and give the equation of the asymptote. Use the graphs to determine the function's domain and range. (g(x)=4^-x) Determine the transformation(s) that is/are needed to go from (f(x)=4^x) to the given function. Select all that apply. A. shift 4 units downward B. reflect about the (y)-axis C. shift 4 units to the left D. shift 4 units upward E. shrink vertically F. shrink horizontally G. reflect about the (x)-axis H. stretch horizontally I. shift 4 units to the right J. stretch vertically

At time t=0, a system consists of three spheres with different masses located at the distances shown on the figure. a. Draw a free body diagram for the center sphere, indicating the gravitational force acting on it due to the spheres surrounding it. Each vector should consist of an arrow starting on and pointing away from the center sphere. The length of the vectors should be drawn relative to their magnitudes. Make sure to label the arrows.

What is the measure of angle MJK in the figure below? A. 58° B. 64° C. 32° D. 60° E. 15° F. Cannot be determined

Solve the following equation for "T" using the values of the other variables listed below. u = sqrt(3 * R * T / M̄) u = 300 M̄ = 0.056 R = 8.314

The rectangular prisms shown below are similar. What are the values of x and y? x : y :

Matching Question Match the magnitude of the equilibrium constant K with the correct description of the reaction system. (i) Instructions Small K Intermediate K Both reactants and products will be present in significant amounts at equilibrium. Large K Equilibrium favors the reactants; there will be more reactants than products at equilibrium. Equilibrium favors the products; there will be more products than reactants at equilibrium.

Use the graph of F to find the given limit. When necessary, state that the limit does not exist. lim as x approaches 5 of F(x) Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. lim as x approaches 5 of F(x)= (Type an integer or a simplified fraction.) B. The limit does not exist.

A bullet in a gun is accelerated from the firing chamber to the end of the barrel at an average rate of 6.20 x 10^5 m/s^2. What is the muzzle velocity of the bullet if the barrel is 52.0 cm long? Use the equation v^2 = v0^2 + 2a(x - x0). 439 m/s 949 m/s 529 m/s 190 m/s

For questions 1-6 use the image to the right (assume air resistance is not present): 1. In order to throw the ball the shortest, the football player should throw the ball at a) 15° b) 45° c) 75° d) Any angle, as long as the speed is the same, they land in the same place 2. The ball will stay in the air the shortest (for the least time) if it is thrown at a) 15° b) 45° c) 75° d) Any angle, as long as the speed is the same, they spend the same time in the air 3. The ball has the greatest vertical velocity when launched at a) 15° b) 45° c) 75° d) Horizontal velocity is the same at each angle

Estimate the AVERAGE rate of change from x=2 to x=5 for the following function f(x) whose graph is given below. (You can click on a graph to enlarge it.) Average rate of change: Note that the average rate of change of a function from x=a to x=b is (f(b)-f(a))/(b-a).

Find h as indicated in the figure. h = □ (Round to the nearest integer as needed.) 27.2° 30.4° 315 h

Why does a golf ball appear white? The ball reflects visible light at a white-colored frequency. The ball reflects all colors of visible light. The ball absorbs all colors of visible light. The ball reflects colors outside of the visible spectrum.

A worker pushes a 1.50 x 10^3 N crate with a force of 345 N a distance of 24.0 m. Assume the coefficient of kinetic friction between the crate and the floor is 0.220. How much work is done by the worker on the crate?

SpaceX launched another rocket at a 60-degree angle has an 1 m / s. Draw an annotated diagram and solve the problem in the space provided below.

3 Multiple Choice 1 point The Ring of Fire is located ... around the Pacific ocean. around the Atlantic ocean. around the equator. around the African continent.

When a chef prepares a dinner for a customer, which factor is physical capital? the food ingredients the chef's training and experience the chef the oven

Item Trial 1 Empty Cart Trial 2 Empty Cart Trial 3 With 200g Trial 4 With 200g --- --- --- --- --- Total Mass of Cart (kg) .2482 .2482 .4482 .4482 Work Done (Area) (N-m) .096 .091 .096 .217 Velocity, Initial (m/s) 0 0 0 0 Velocity, Maximum (m/s) .701 .679 .808 1.040 Change in Kinetic Energy (J) .0609 0.0572 .1463 .46617

The position of a hummingbird flying along a straight line is given by the functions s(t)=2t^4-2t^3-2t^2-8 where t is measured in seconds and s is measured in meters. Find the acceleration function a(t). Provide your answer below: a(t)=

In the brake mode, what does the Torque meter indicate when the torque correction function is disabled?

Question 9 10 pts A truck with 22-in.-diameter wheels is traveling at 45 mi / h. Find the angular speed of the wheels in rad/min, hint convert miles to inches hours to minutes: rad/min How many revolutions per minute do the wheels make? rpm Round your answers to 1 decimal place.

Question 4 Using the figure below, categorize electromagnetic radiation with a wavelength of 1.0 x 10^-3 m. Infrared X rays Ultraviolet Microwave Gamma rays

2e^3x cdot 9e^3x

The figure below shows a quadrilateral ABCD such that AB and DC are equal and parallel. A student wrote the following sentences to prove that quadrilateral ABCD is a parallelogram: Quadrilateral ABCD is a parallelogram because its opposite sides are equal and parallel. Which statement best describes an error in the student's proof? Triangles ABO and BCD are congruent by the SSS postulate instead of the SAS postulate. Triangles ABO and BCD are congruent by the AAS postulate instead of the SAS postulate. Angle DBC and angle BDA form a pair of corresponding angles, not a pair of vertical angles. Angle DEC and angle BOA form a pair of alternate interior angles that are congruent, not a pair of vertical angles.

Find (x) and (y).

Guess f(a) and lim as x approaches a of f(x)

A 60-Newton rightward force is applied to a 15-kg object to accelerate it to the right. The object encounters a friction force of 30 Newton. Fill in all blanks. (Use the approximation that g ~ 10 N / kg.) Fnorm = Fapp = Fgrav = Ffrict = m = a = Fnet =

assigns each call a certain amount of time on a selected frequency. A) CTMA B) CDMA C) MTSO D) TDMA

Convert the pressure 578 N / km^2 to pascals (Pa). Recall that 1 Pa=1 N / m^2.

Are the stars from Question 3 inside or outside the Milky Way Galaxy? Explain your reason.

A projectile is launched horizontally. As it travels along its trajectory toward the ground, the horizontal component of its velocity and the vertical component of its velocity a. increases, increases b. decreases, decreases c. increases, decreases d. decreases, increases e. remains the same, increases f. remains the same, decreases g. increases, remains the same h. decreases, remains the same i. remains the same, remains the same

6. Objects of various weights are hung from a rubber band that is suspended from a hook. The weights of the objects are plotted on a graph against the stretch of the rubber band. How can you tell from the graph whether the rubber band obeys Hooke's law? 7. How must the length of a pendulum be changed to double its period? How must the length be changed to halve the period? 8. If a car's wheel is out of balance, the car will shake strongly at a specific speed but not at a higher or lower speed. Explain. 9. How is uniform circular motion similar to simple harmonic motion? How are they different? Periodic Motion Lesson 1 1

Case III. A + B + C = 0 vector mass, kg magnitude, N direction x-component y-component A 0.200 0° B 0.150 90° C verified:

Match each letter in the image to the correct type of quadrilateral. (i) Instructions rectangle

The force of gravity on an object varies directly with its mass. The constant of variation due to gravity is 32.2 feet per second squared. Which equation represents F, the force on an object due to gravity according to m, the object's mass? F=16.1 m F=16.1/m^2 F=32.2 m F=32.2/m^2

Exercise 2 In the above circuit: 1. Find the voltage across and the current through each component 2. Prove that the power generated = power absorbed 3. Deduce the readings of the voltmeters

In the exponential model f(x)=a(1+r)^x, the parameter a is the Select an answer and r is the Select an answer

A tower that is 132 feet tall casts a shadow 174 feet long. Find the angle of elevation of the sun to the nearest degree. The angle of elevation is degrees. (Round to the nearest degree.)

Convert -668° to radians: π

Determine the area of a triangle with points A(0, 1, 6), B(6, 2, -5), and C(1, -6, 6). Area = 7899 / 2 ×

Multiple Choice Question The speed of most modern processors is measured in gigahertz megahertz terahertz kilohertz Ingram Publishing

A ball is launched upward at an angle. The diagram at the right shows approximate values of the horizontal and vertical velocity at 0.0 seconds. For the three times below, identify the size and direction of the vx and vy vectors.

Find the solution of the differential equation that passes through the given point. dy/dx=x^3 y y=-2 e^x[?] /[]

Gravitational acceleration on the moon is approximately one-sixth of that on Earth. A ball released from rest above the surface falls from height d in a time of t=12 seconds. Part (a) Write an expression for the final velocity v of the ball when it impacts the surface of the moon assuming it is dropped from rest. This expression should be in terms of only, 8 (the gravitational acceleration on Earth), and elapsed time, t. Part (b) Calculate the final velocity, yy , in meters per second. Part (c) Calculate the height d, in meters, from which the ball was dropped. Part (d) From how high up would this ball need to be dropped on the earth, de (in meters), if it took the same time to reach the ground as it did on the moon?

Question 15 Multiple Choice Question Points If you wish to visualize data so that the information is represented as vertical bars, create a Line chart Clustered Column Chart Sales Total pie graph

Suppose a large population has mean μ and standard deviation σ, and a simple random sample of size n is taken. The sampling distribution of the sample mean x̄ has mean and variance respectively equal to a) μ / n and σ^2 / n b) μ and σ / n c) μ / n and σ^2 / n. d) μ and σ^2 / n.

Problem 2 A charge of (q1=4.0 mu mathrmC) is at the origin and a charge (q2=2.0 mu C) is at (x=-10 mathrm~m) along the (x)-axis. What is the magnitude and direction of the force on a charge, (q0=2.0 mu mathrmC), at (x=0 mathrm~m, y=1 mathrm~m), due to (q1) and (q2) ?

Determine if the given situation results in a discrete random variable, a continuous random variable, or is not a random variable. The speed of a car on the highway. Discrete random variable Continuous random variable Not a random variable

Multiple Choice Question Rate your confidence in using your phone □ 6 (Extremely confident) □ 5 □ 4 (Neutral) □ 3 □ 2 □ 1 (Not at all confident)

QUESTION 5 Which is the largest ecological system in scale? a. population b. biosphere c. ecosystem d. community

Given: QP TS Prove: QT/TR=PS/SR Statement Reason 1 QP TS 2 ∠RQP ≅ ∠R 3 ∠R ≅ ∠R 4 ΔPQR ∼ ΔSTR 5 QR/TR= /SR Given 2 ∠RQP ≅ ∠RTS 3 ∠R ≅ ∠R 4 . ΔPQR ∼ ΔSTR 5 QR/TR= /SR 6 QR=QT+TR 7 PR=PS+SR 8 (QT+TR)/TR= /SR 9 QT/TR+TR/TR=PS/SR+SR/SR 10 QT/TR+1=PS/SR+1 11 QT/TR= /SR

Solve the problem. If a rock falls from a height of 20 meters on Earth, the height H (in meters) after x seconds is approximately H(x)=20-4.9 x^2 When does the rock strike the ground? Round to the nearest hundredth, if necessary.

A racehorse coming out of the gate accelerates from rest to a velocity of 15.0 m / s due west in 1.80 s. What is its average acceleration?

Error Analysis: A student writes the inequality in interval notation, as shown. x >= 17 [17, infinity] Explain why this is incorrect.

To test the performance of its tires, a car travels along a perfectly flat (no banking) circular track of radius 361 m. The car increases its speed at uniform rate of [ at = fracdvd t=3.01 mathrm~m / mathrms^2 ] until the tires start to skid. If the tires start to skid when the car reaches a speed of (31.5 mathrm~m / mathrms), what is the coefficient of static friction between the tires and the road?

Calculate the average translational kinetic energy, Ek, for one mole of gas at 801 K. Translational kinetic energy is sometimes called average kinetic energy. Ek= J / mol Calculate the average translational kinetic energy for a single gas molecule at 801 K. Ek= J / molecule

Select the correct answer. Kamal is a data center manager at an IT service company. He wants to implement the 802 × authentication framework. Which of these items correctly describes the function of an authentication server? A. to request credentials from the supplicant through the authenticator B. to check if there are any new nodes on the network C. to provide credentials to the supplicant through the authenticator D. to pass on information from the supplicant to the authenticator

The temperature of a sample of copper increased by 23.5°C when 269 J of heat was applied. Substance Specific heat J /(g · °C) --- --- lead 0.128 silver 0.235 copper 0.385 iron 0.449 aluminum 0.903

A rock band is holding a concert in the local park and using three 1000-Watt speakers (totaling 3000 Watts) to project the sound. You visit the concert and consider two seats. Seat A is an average distance of 20 meters from the speakers. Seat B is an average distance of 50 meters from the speakers. How does the decibel rating of the two seats compare when the speakers are blasting at 100% efficiency? The sound at Seat A is 2 dB higher than the sound at Seat B. The sound at Seat A is 2.5 dB higher than the sound at Seat B. The sound at Seat A is 3 dB higher than the sound at Seat B. The sound at Seat A is 8 dB higher than the sound at Seat B.

Find the difference of the following expressions. [ (-5-8 i)-(7-6 i) ]

Perform the indicated operations. [ (-6+sqrt-16)^2 ]

Homework: HW 2 Question Completed: 2 of 23 Part 5 of 5 My score: 1.75 / 23 pts (7.61%) Use the graph of h in the given figure to find the following values or state that they do not exist. (a) h(5) (b) lim x -> 5 h(x) (c) h(7) (d) lim x -> 7 h(x) (e) lim x -> 8 h(x) A. lim x -> 7 h(x)=4 (Type an integer or a decimal.) B. The limit does not exist. (e) Find lim x -> 8 h(x). Select the correct choice and, if necessary, fill in the answer box to complete your choice. A. lim x -> 8 h(x)= (Type an integer or a decimal.) B. The limit does not exist.

Consider the position function (s(t)=sin(pi t)) representing the position of an object moving along a line on the end of a spring. Sketch a graph of (s) together with the secant line passing through ((0, s(0))) and ((0.9, s(0.9))). Determine the slope of the secant line and explain its relationship to the moving object. Determine the slope of the secant line. (msec=0.343) (Round to the nearest thousandth as needed.) What is the relationship of the slope to the velocity of the moving object? A. The slope is the average velocity of the object over the interval ([0,0.9]). B. The slope is the maximum velocity of the object. C. The slope is the instantaneous velocity when (t=0.9). D. The slope is the average velocity of the object over the interval ([0,0.309]).

A small hole in the wing of a space shuttle requires a 16.1 cm^2 patch. What is the patch's area in square kilometers (km^2)? Be sure your answer has the correct number of significant figures. If the patching material costs NASA 3.64/in^2, what is the cost of the patch to the nearest cent? Be sure your answer has the correct number of significant figures.

If an electron is accelerated from rest through a potential difference of 1,500 V, what speed does it reach? 2.3 × 10^7 m / s 1.9 × 10^7 m / s 1.5 × 10^7 m / s 1.1 × 10^7 m / s

We test if artificial sunlight during the winter months lowers one's depression. Without the light, a depression test has μ=8. With the light, our sample with N=41 produced X̄=6. The tcat =-1.83. 1. What are the hypotheses? 2. What is tot ? 3. What is the conclusion? 4. If N had been 50, would the results be significant?

Given: CD bisects AE, AB CD angle E congruent to angle BCA Prove: triangle ABC congruent to triangle CDE

What is the x coordinate of point P, in meters? x=1 m

∫ Al2+1 Al2

Unit Exam - States of Matter and Phase Change The kinetic theory states that particles of matter are always in motion. The amount of energy depends on the state of matter. Particles in a GAS have MORE kinetic energy than particles in a SOLID. Motion: Temperature: The amount of matter: The kind of particles: What happens when temperature is increased to the Kinetic Energy of particles? Congratulations! You have completed the Unit Exam - States of Matter and Phase Change. Temperature The amount of particles The kind of particles

Write the domain set for this function f(x)=1 (x^3-3 x^2-6 x-8)

A -6.5 μC charge experiences a downward electric force of 5.9 N. Find the magnitude and direction of the electric field at the position of this charge.

It's All Uphill Interactive Background: In this Interactive, you will analyze the motion of a cart being pulled up an inclined plane at a constant speed. The angle of the incline can be modified by 10° increments between the values of 30° and 90°. Three different masses can be selected - 2.0 kg, 3.0 kg, and 4.0 kg. In each simulation, the cart is pulled to the same height -1.0 meter above the original starting position. For each simulation, the force that must be applied is reported on the screen. The displacement of the cart can be measured using the cm ruler that is displayed for each trial. Purpose: To determine the effect of the angle of an inclined plane upon the amount of force and the amount of work done when pulling a cart up an inclined plane at a constant speed and to the same height. Discussion of Procedure: Select a mass from one of the three choices. Tap the Run Trial button. The force required to pull the cart at a constant speed is displayed on the screen; record in the Data Table. The displacement from the starting position to the final position can be measured using the cm ruler; record in the Data Table. (Note that the table lists meters as the unit.) The force and the displacement vectors are both directed parallel to the inclined plane. Use the force and displacement to calculate the work done. Repeat the procedure for all angles. Data tables are provided for a single cart mass. Additional tables can be made if necessary. Data: Mass: kg Angle ( ° ) Force (N) Displacement (m) Work (J) 30.0 40.0 50.0 60.0 70.0 80.0 90.0

Convert 40.5 miles per hour to m / s .(1 km=0.621371 mi)

Given the graph, find the following: Domain: Range: x-intercept(s): y-intercept: End Behaviors: Vertex: Increasing Interval(s): Decreasing Interval(s):

Ended Questions: Answer the following questions in complete sentences: 1. Explain how volcanic eruptions can be both constructive and destructive forces.

A sample of 420 people is selected. The people are classified according to place of residence ("urban", "suburban", or "rural"). They are also classified according to highest educational degree earned ("no college degree", "two-year degree", "four-year degree", or "advanced degree"). The results are given in the contingency table below. No college degree Two-year degree Four-year degree Advanced degree Urban 31 43 23 28 Suburban 47 45 46 25 Rural 23 15 47 47 What is the relative frequency of people in the sample whose place of residence is suburban and whose highest degree is a four-year degree? Round your answer to two decimal places.

What happens when the core of the supergiant collapses? It becomes a White Dwarf It collapses into nothing Nuclear fission begins It becomes a Supernova

3. Common static electricity involves charges ranging from nanocoulombs to microcoulombs. (a) How many electrons are needed to form a charge of -4.00 nC (b) How many electrons must be removed from a neutral object to leave a net charge of +0.2500 μC?

Graph the system of inequalities: x-y ≤ 1 x+2y < 4

Even with the best and largest telescopes, we can't see all the stars in the Milky Way Galaxy, even though these same telescopes can show us other galaxies. Why is that? dust in the space between stars builds up over large distances and blocks the light from the stars behind the dustier parts of the Milky way the Milky Way Galaxy turns too quickly this is still an unsolved problem in astronomy starlight is not able to travel through black space the lights of Pikeville, Kentucky are too bright and interfere with our observations

2. How long must a pendulum be on the Moon, where g=1.6 N / kg, to have a period of 2.0 s ? 3. On a certain planet, the period of a 0.75-m-long pendulum is 1.8 s. What is g for this planet?

An insulated cup contains 75.0 g of water at 24°C. A 26.00 g sample of metal at 82.25°C is added. The final temperature of water and metal is 28.34°C. What is the specific heat of the metal?

3. HOCKEY The goals in a hockey rink are 6 feet wide. A hockey player is standing 25 feet directly in front of the left side of one of the goals. a. What is the maximum angle at which the player can shoot the puck to make it in the goal? 0=2 * tan^(-1)(w/(2d))=43 * 408 / pi degrees b. If the player skates forward 5 feet, how wide of a range of angles can the player shoot the puck to make it in the goal? 0=2 * tan^(-1)(0/(2a))=54.408 / 2 dog c c. Describe what happens to the maximum angle as the player gets closer to the goal. As the player skates closer to the goal, maximum angle theta increases due to the tangent function increasing. 4. KITES Suppose the string of a kite makes a 78° angle with the ground. If 45 feet of string is released, how high off the ground is the kite? h * L * sin(pi) h=4 sin(78°)=45/8+43 sqrt(3)/8+45 sqrt(3)/2 5. CURRENT The current I in amperes for a circuit at time t seconds is given by I=40 cos[60 pi(t+1/120)] a. Find the maximum current. Imax=40 amperes 6. WINDSHIELD WIPER A 12-inch windshield wiper blade rotates 120° as shown. Find the coordinates of the starting and ending points A and B of the tip of the blade relative to the pivot point O.

1.- TIEMPO DE ALTURA MAXIMA EN TIRO PARABOLICO 2.- VELOCIDAD FINAL EN MRUA 3.- LA VELOCIDAD EN EL MRUA 4.- EN TIRO VERTICAL ASCENDENTE LA VELOCIDAD 5.- LA ACELERACIÓN EN EL MRUA 6.- EN CAIDA LIBRE LA VELOCIDAD INICIAL 7.- ALCANCE EN EL TIRO PARABÓLICO 8.- UNIDAD DE VELOCIDAD EN EL S.I. 9.- DESPLAZAMIENTO EN MRU 10.- EN TIRO VERTICAL LA ACELERACIÓN

Convert 352 lightyears/century into feet/second. Show ALL the steps...answer to 2 decimal places.

-(pi/6)

A 0.60 kg mass is vibrating at the end of a spring. If the spring constant is 26 N / m, and the maximum displacement of the mass is 0.15 m, what is the speed of the object at its equilibrium position?

Question 11, 1.5.143 HW Score: 76.92% Part 1 of 2 Points: 0 of 1 1.5B Homework a. A wheelchair ramp with a length of 75 inches has a horizontal distance of 72 inches. What is the ramp's vertical distance? b. Construction laws are very specific when it comes to access ramps for the disabled. Every vertical rise of 1 inch requires a horizontal run of 12 inches. Does this ramp satisfy the requirements? a. The vertical distance of the ramp is

y > 3/2 x + 6

After 0.600 L of Ar at 1.06 atm and 245.0°C is mixed with 0.200 L of O2 at 313 torr and 104.0°C in a 400 mL flask at 25.0°C, what is the pressure in the flask? Be sure your answer has the correct number of significant figures.

Morgan drew 3 lines. - Line A moves in the same direction as Line B and the lines never intersect. - Line B forms a perfect right angle (90° angle) with Line C. Which statement is correct about these lines? Line B is parallel to Line C Line C is perpendicular to Line A Line C is parallel to Line A Line A is perpendicular to Line B Connor created an angle that formed a 130° angle. What type of angle did he create? obtuse straight acute right

Find the distance between Rivertown and Smithville if they are 0.8 cm apart on a map with a scale of 1 cm : 17.7 km.

A uniform 33.0-kg beam of length l=5.40 m is supported by a vertical rope located d=1.20 m from its left end as in the figure below. The right end of the beam is supported by a vertical column. (i) (a) Find the tension in the rope. N (b) Find the force that the column exerts on the right end of the beam. (Enter the magnitude.) N

What is the mass of an object accelerating at 3.9 m/s^2 as it experiences 225 N of force?

A scientist wishes to learn about volcanoes and earthquakes. Which of the following spheres should she most directly study? (2 points) Atmosphere Biosphere Cryosphere Geosphere

Convert the speed 25 mi / hr to feet / s

Lesson 2.1: Measuring Segments and Angles Congruent Angles

The momentum of an object is determined to be 7.2 x 10^-3 kg · m / s. Express this quantity as provided or use any equivalent unit. (Note: 1 kg = 1000 g).

The warmer weather of summer in many parts of the Northern Hemisphere is caused by the fact that during this period - this area is closer to the Sun than at other times. the Sun emits the greatest amount of energy. the melting of ice raises the sea level in this area. this area receives more direct sunlight.

Indicate the answer choice that best completes the statement or answers the question. ANALYZE GRAPHS Use the graph shown. The total enrollment at Central High School is 798 students. About what percent of the students at Central High are freshmen? Round to the nearest tenth if necessary. a. 30.7 % b. 27.1 % c. 22.6 % d. 19.7 %

Homeostasis

The mass of a radioactive substance follows a continuous exponential decay model. A sample of this radioactive substance has an initial mass of 1274 kg an decreases continuously at a relative rate of 7% per day. Find the mass of the sample after three days. Do not round any intermediate computations, and round your answer to the nearest tenth. kg

Which of Kepler's Laws explains: Planets orbit in an ellipse with the sun at one focus. 1st Law 2nd Law 3rd Law

Which of Kepler's Laws explains: Mercury has a shorter orbital period than Neptune

On Earth and the Moon, the mass of an object would be equal different but the weight would be different because of differences in gravity. Since the force of gravity on Earth is higher, you would expect to weigh more on Earth and less on the Moon.

The graph below is the function f(x) Select all statements below that you agree with. Note: You may be checking more than one box. No partial credit. f(2) is defined. lim x → 2 f(x) exists. lim x → 2 f(x) = f(2) The function is continuous at x=2. The function is not continuous at x=2.

A 2.80 kg mass is dropped from a height of 4.50 m. What is the potential energy of the mass when it reaches the ground? PE=[?] J

After a 100-lb. person steps on a bathroom scale and the reading is steady, the spring inside the scale is compressed with a force of (A) 100 lbs . (B) 50 lbs . (C) 200 lbs (D) 110 lbs .

What is the unit vector of v = ⟨6, -9⟩?

In this problem, you will apply kinematic equations to a jumping flea. Take the magnitude of free-fall acceleration to be 9.80 m / s^2. Ignore air resistance. A flea jumps straight up to a maximum height of 0.410 m. What is its initial velocity v0 as it leaves the ground? Express your answer in meters per second to three significant figures.

If a ball is thrown in the air with an initial height of 3 feet, and if the ball remains in the air for 3 seconds, then accurate to the nearest foot, how high did it go? Remember, the acceleration is a(t)=-32 ft / sec^2 v(t)=-32 t+47 s(t)=-16 t^2+47 t+3 Peak height =s(1.47) s(1.47)=[?] feet

While driving a car, you see a child suddenly crossing the street. Your brain registers the emergency and sends a signal to your foot to hit the brake. The car travels a reaction distance D, in feet, during the time it takes you to react, where D is a function of the car's speed r, in miles per hour. That reaction distance is a linear function given below. Complete parts (a) through (d). D(r) = (33r + 16) / 32 a) Find D(5), D(20), D(50), and D(65). D(5) = 5.7 D(20) = 21.1 D(50) = 52.1 D(65) = 67.5 (Round to the nearest tenth as needed.) b) Choose the correct graph of D(r). A. c. B. D. c) Interpret the meaning of the slope in the context of this problem. For every 1-mph increase in speed, the braking distance increases by .

Use the Sensible Heat Formula to determine the heating system capacity of the following system. CFM: 2500 Return air DB: 68 degrees Fahrenheit Supply air DB: 56 degrees Fahrenheit 32,400 BTU 27,778 BTU 21,600 BTU 18,519 BTU

Select the reason why these triangles are similar. If they are not, select "Not similar."

Which is the largest object in the solar system? a Sun b Moon c Earth d Saturn

What is the magnitude and direction net force on qi.?

A ball is thrown straight up in the air at a velocity of 100 feet per second. The height of the ball at t seconds is given by the formula: h=100 t-5 t^2. Find the maximum height of the ball and when it will land. Maximum height: ft Land after: seconds

A micro-transporter moves from one side of an evacuated chamber to another. It is powered by equal-magnitude, opposite-sign charges Q and -Q on top of two station points, as shown in (Figure 1). The transporter's mass is 1.0 g and it is carrying a positive charge of 6.0 × 10^-10 C. If a 7.0 × 10^-3-N friction force opposes the transporter's motion, what must be the magnitude of Q to make the transporter move with an initial acceleration of 1.0 m / s^2 ? Express your answer with the appropriate units.

Which list below describes a possible path of rain through the water cycle? (3 points) Evaporation, condensation, precipitation, runoff Runoff, ocean storage, evaporation, condensation Transpiration, condensation, precipitation, runoff Evaporation, precipitation, runoff, lake storage

7. The word pressure MOST NEARLY means: A. a quantity that has both size and direction B. the speed of an object in a particular direction C. the distance traveled divided by the time interval during which the motion occurred D. the upward force that keeps an object immersed in or floating on a liquid E. the amount of force exerted per unit area of a surface

Which of the following is true about the states of matter? SELECT ALL THAT APPLY Liquids have neither a definite shape nor a definite volume. Matter exists in solid, liquid, and gaseous states. Solids have a definite shape and volume.

Someone coughing in the audience or walking late during a presentation are examples of wha element in the speech communication process messages interference channe! feedback

10 Multiple Choice 1 point Which statement most accurately describes the second law of thermodynamics? Energy can be created or destroyed but it cannot be transformed. Energy cannot be changed from one form to another without a loss of usable energy. Energy cannot be created nor destroyed but it can be changed from one form to another. One usable form of energy can be completely converted into another usable form.

Which of the following is true for the function shown above. A Extrema =(3.47,-0.74) B Local Max =0.76 at x=-0.74 C Local Max =0 at x=5 D Local Max =-0.74 at x=0.76 E Local Max =-0.74 F Extrema =(0,0.6)

Which of the following would most likely utilize a particulate control device? a. a vacuum cleaner b. a factory smokestack c. a laundry dryer d. all of the above

4 Multiple Choice 1 point The Supine Legs in Straps Lower and Lift is done in what plane of motion? Sagittal Frontal Transverse All planes

When you stand at rest on a pair of bathroom scales, the readings on the scales will always each be half your weight. add up to equal your weight. each equal your weight.

A 1500-kg car moving at 15 m/s collided head-on with a 2000-kg SUV traveling at -20 m/s. If the car now moves at -1 m/s, what is the new speed of the SUV?

2. What is the slope of the line pasklaty thrownth the points A and B, as shown on the soxapto belown the A. -3 B. -1/3 C. 3 D. 1/3 3. Given a line with a slope of 4, how does of the line cifer if the sloge is changel

Emilio throws a marshmallow into the air from his balcony. The height of the marshmallow (in feet) is represented by the equation h=-16t^2+8t+48, where t is the time (in seconds) after he throws the marshmallow. How long does it take the marshmallow to hit the ground, where h=0? 0.5 seconds 3 seconds 2 seconds 1.5 seconds

Which of the following is not a factor in determining the effectiveness of a brake system? a. heat dissipation b. lubricant c. pressure d. frictional contact area

Is boiling water a physical or chemical change? Physical Chemical

Use the diagram of a box being pushed across the shop floor below to determine the weight of the object. Round your answer to the NEAREST WHOLE NUMBER and use the correct Unit: EXAMPLE: 15N

Solve the following system by graphing. y = -(8/3) x - 9 y = -(8/3) x + 1 (1,9) no solution None of the other answers are correct (-1,-9) (-1,4)

Consider M2 = 200 lb·ft and the resultant couple moment MR = Mx i + 12j. The magnitude of the Mx is ...... lb. ft. The magnitude of the moment M1 is .... lb. ft. The magnitude of the couple moment M3 is ..... lb. ft. The direction angel θz between the moment vector 150 lb. ft and z-axis is ....

The mass of a ball moving at 3 m / s with a momentum of 48 kg m / s is 12 kg, 16 kg, 4 kg, 144 kg, none of these.

A boat begins at A and heads straight across a river. Because of the 2 m/s river current, the boat lands on the opposite shore at C. If the river current was 3 m/s, then the boat would land on the opposite shore at (The boat speed relative to the water does not change.) a. the same location of C b. a location south of C c. a location north of C d. Nonsense! This is impossible to answer without knowing the time to cross the river.

Which electronic device would be considered a node in a lawyer's office network? A. A client's gaming system B. The office coffee maker C. The attorney's laptop D. The secretary's car navigation system

3. Two cats are on a seesaw, which is a 5.5 -meter long wood plank. The orange cat has a mass of 5.93 kg and is 0.361 meters from the edge of the plank. The black cat is sitting at 2.71 meters from the pivot point, what is the weight of the black cat?

Course: 26211 - Control Systems TAO; test session https://testrunner-ignite.prod.gcp-eu.taocloud.org/?deliveryExecutionld=3636124%25230964f38a4228%25230a 11 - Control Systems and Fundamental Concepts What type of coil arrangements should be in low-voltage remote control switching relays? a single coil a split line-voltage coil a single high-voltage coil three low-voltage coils

How do greenhouse gasses contribute to the Earth's temperature?

The map shows the present-day locations of the continents and oceans. The star shows the location of fossils from a prehistoric animal called Cynognathus. Based on past movement of tectonic plates, which other location would most likely also have Cynognathus fossils? A. Location A B. Location B C. Location C D. Location D

Find the slope of the line graphed below.

What is the angle between the given vector and the positive direction of the x-axis? (Round your answer to the nearest degree.) i+√15 j

A boat begins at point A and heads straight across a 60-meter wide river with a speed of 4 m / s (relative to the water). The river water flows north at a speed of 3 m / s (relative to the shore). The boat reaches the opposite shore at point C. Which of the following would cause the boat to reach the opposite shore in MORE time? Include all that apply. a. The river flows north at 2 m / s. b. The river flows north at 4 m / s. c. The boat heads across the river at 3 m / s. d. The boat heads across the river at 5 m / s. e. The river is 40 meters wide. f. The river is 80 meters wide. g. Nonsense! None of these affect the time to cross the river.

Identify this triangle's hypotenuse: AB BC AC Angle B

A military jet cruising at an altitude of 12.0 km and speed of 1300 km/h burns fuel at the rate of 71.6 L/min. How would you calculate the amount of fuel the jet consumes on a 950 km mission? Set the math up. But don't do any of it. Just leave your answer as a math expression. Also, be sure your answer includes all the correct unit symbols.

For the function involving the variables listed, use your intuition or additional research, if necessary, to complete parts (a) through (c) below. (day of year, average high temperature) over a 2-year period for a town a. Describe an appropriate domain and range for the function. Choose the appropriate domain for the function below. A. The domain is all daily average high temperatures over 2 years or -20°F to 120°F. B. The domain is all days over a 2-year period or 1 to 365, where day 1 is July 1st. C. The domain is all days over a 2-year period or 1 to 730, where day 1 is July 1st. D. The domain is all daily average high temperatures over 2 years or 50°F to 90°F. Choose the appropriate range for the function below. A. The range is all days over a 2-year period or 1 to 365, where day 1 is July 1st. B. The range is all daily average high temperatures over 2 years or 50°F to 90°F. C. The range is all daily average high temperatures over 2 years or -20°F to 120°F. D. The range is all days over a 2-year period or 1 to 730, where day 1 is July 1st. b. Make a rough sketch of a graph of the function. Choose the correct graph below. Let t represent time in days and F represent temperature in degrees Fahrenheit. c. Briefly discuss the validity of the graph as a model of the true function. Choose the correct answer below. A. The graph is a valid model of the function because time in days fluctuates as temperature in degrees Fahrenheit increases. B. The validity of the graph as a model of the true function can never be known. C. The graph is not a valid model of the true function. D. The graph is a valid model of the function because temperature in degrees Fahrenheit fluctuates as time in days go through seasons.

A particle is moving along a straight line with an initial velocity of 5 m / s when it is subjected to a deceleration of (a=(-1.8 v^1 / 2)) m / s(^2), where (v) is in m / s. Part A Determine how far it travels before it stops. Express your answer to three significant figures and include the appropriate units. Part B How much time does this take? Express your answer to three significant figures and include the appropriate units.

What effects does ionizing radiation have on the atmosphere? Select the two correct answers. (1 point) It ionizes atoms and molecules in the thermosphere. It helps atoms to escape Earth's gravity in the exosphere. It is the chief cause of warming in the troposphere. It forms ozone in the stratosphere.

Find an equation of the line that satisfies the given conditions. Through (4,9); parallel to the line passing through (5,7) and (1,3)

Question 9 0 / 1 pt (3) The graph of (y=frac-7 x-53 x+10) has a horizontal asymptote with equation (square) (enter the equation of the horizontal asymptote)

1. If Steve throws the football 50 meters in 3 seconds, what is the average speed of the football? 2. If it takes Ashley 3 seconds to run from the batter's box to first base at an average rate of 6.5 meters per second, what is the distance she covers in that time? 3. Bart ran 5000 meters from the cops at an average rate of 6 meters/second before he got caught. How long did he run? 4. If Justin races his Chevy S-10 down Highway 37 for 2560 meters in 60 seconds, what is his average speed? 5. Mike rides his motorcycle at an average speed of 20 meters/second for 500 seconds, how far did he ride? 6. Sarah backstrokes at an average speed of 8 meters per second, how long will it take her to complete the race of 200 meters length?

3. Ida hit a golf ball from the top of a hill. The height of the ball above the green can be modeled by the regression equation h(t)=-9.7 t^2+48.4 t+11.5 where h represent the height in meters and y represents the time in seconds. a) Use your knowledge of polynomial functions to describe the curve of this function. b) Determine the y-intercept. What does it represent in this context? Show your work. c) The roots of this equation are near t=-0.2 and t=5.2. What do these points represent, if anything?

Find a positive angle less than (2 pi) that is coterminal with the given angle. [ frac35 pi6 ] A positive angle less than (2 pi) that is coterminal with (frac35 pi6) is (square)

For the right triangle below, find the length of (x). Round to the nearest hundredth (two decimal places).

The deepest point in the ocean is located in the Mariana trench.

Question 14 Quiz: Pre-Class Quiz - The Process of Science As shown in the graph, how have atmospheric carbon dioxide levels changed between 1960 and 2018? atmospheric carbon dioxide levels have decreased atmospheric carbon dioxide levels initially increased, then decreased, for a net increase atmospheric carbon dioxide levels have increased atmospheric carbon dioxide levels have stayed the same Question 15 Which of the following lists is in the correct order, from smallest to largest? MacBook Air

In an automobile crash, a vehicle that was stopped at a red light is rear-ended by another vehicle. The vehicles have the same mass. If the tire marks show that the two vehicles moved after the collision at 4 m / s, what was the speed of the vehicle before the collision?

Question 5 (1 point) For activities that involve distance and time, you can improve your performance in two ways: increase the distance you cover in the same amount of time, decrease the time needed for the same distance, both, neither are correct.

Solve the following triangles- Show all work for full credit. ( 5 marks each)

A 6.2 ft tall man creates a 67° angle of elevation when he looks up to the top of a building from the ground. If he stands 20 feet from the building, how tall is the building?

2.3: Functions and Relations Question 23 of 25 (1 point) I Question Attempt: 2 of Unlimited Use the graph of y=f(x) to answer the following. Part: 0 / 8 Part 1 of 8 (a) Determine f(-4). f(-4)=□

Read this excerpt from "Mars: Landscape of the Red Planet." NASA and its European equivalent, ESA, currently have spacecraft orbiting Mars, delivering pictures and weather reports back to Earth. On January 3 and 24, 2004, NASA landed two robotic rovers named Spirit and Opportunity on the Martian surface. The twin rovers have spent the last nine years exploring Mars, taking pictures, video, and geological samples. This excerpt is most likely to appear in which part of a scientific text? introduction methods results conclusion

According to Boyle's Law, the pressure, P, of a compressed gas is inversely proportional to the volume, V, of the gas. If the pressure of a sample of gas is 20 pounds per square inch (psi) when its volume is 500 cubic inches, what is the pressure when the volume is 400 cubic inches? 25 psi 40 psi 50 psi 16 psi

A ship is moving in a straight line toward the Point Cove lighthouse. The measure of the angle of elevation from the bridge of the ship to the lighthouse beacon is 25°. Later, from a point 600 ft closer, the angle of elevation is 47°. What is the m< BOT?

A plane can fly 3952 kilometers in 3 hours. If the plane flies in cloudy skies, it can fly 184 less kilometers than usual within the same time. What is the speed for the plane flies in cloudy skies? km / h

UNIT 3- CHALLENCE 3.2: Monitoring Progress and Project Change 2-Monitoring Time IEARNING ORECTME Identity methods used by project managers when monitoring a project schedule. To dedide whether they should rtska posslble overrun, the project manager should compare the percentage of the tasks completed relative to the overall thato. - a) planned b) actual c) estimated d) highest

Mike has offered to make drinks for guests at this year's spring gala. However, he just remembered that he also needs to pick up his brother from the airport the same day. No bartender will be available until Mike arrives with his brother, making this a(i) a) resource risk b) schedule risk C) assumption risk d) deliverable risk

Use the Gauss Jordan method to solve the following system of equations. 5x - 3y + 3z = 9 5x + 2y - z = 16 15x - 4y + 5z = 34 Write the augmented matrix for the corresponding system of equations. Select the correct choice below and fill the answer boxes to complete your choice. A. C. B. [5 -3 3 9 5 2 -1 16 15 -4 5 34] D. [□ □ □ □ □ □ □ □ □ □ □ □ □ □ □ □] Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. The solution is (□, □, in the order x, y, z □ (Simplify your answers.) B. There is an infinite number of solutions. The solution is □, z ), where z is any real number. □ (Simplify your answers. Use integers or fractions for any numbers in the expressions.) C. There is no solution.

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