Physics Homework Questions & Answers Archive

The crystal oscillator is based on the photoelectric effect.

With the information shown above, we can also determine that BC is congruent to BC. Therefore, which of the following theorems affirms that triangle GCB is congruent to triangle HCB? Choose two. A Side-Side-Side Congruence. B Angle - Side - Angle Congruence. C Side - Side - Angle Congruence. D Side - Angle - Side Congruence.

Back to Assignment Attempts Keep the Highest / 1 23. Questions and Problems 26 When speeding tickets were 100, usually 500 speeders were on the roads each month in a given city; when tickets were raised to 250, usually 215 speeders were on the roads in the city each month. Which of the following statements capture the economics in this observation? Check all that apply. - The law of demand holds for speeding. - The law of supply holds for speeders. - This observation is consistent with decreasing opportunity costs.

El movimiento de una partícula a través de cierto medio es tal que en cada segundo recorre una distancia que es 2/3 de la distancia que recorrió en el segundo anterior. Si durante el primer segundo recorre 8/3 metros (m), ¿qué distancia recorrerá antes de llegar al reposo?

Absorption Emission n=1 to n=3 n=2 to n=1 n=3 to n=5 n=3 to n=2 Answer Bank Ignoring sign, which transition is associated with the greatest energy change? n=3 to n=5 n=1 to n=3 n=2 to n=1 n=3 to n=2

In a certain city, the average 20- to 29-year old man is 69.4 inches tall, with a standard deviation of 3.2 inches, while the average 20 - to 29 -year old woman is 64.5 inches tall, with a standard deviation of 3.9 inches. Who is relatively taller, a 75 -inch man or a 70 -inch woman? Find the corresponding z-scores. Who is relatively taller, a 75 -inch man or a 70 -inch woman? Select the correct choice below and fill in the answer boxes to complete your choice. (Round to two decimal places as needed.) A. The z-score for the man, , is larger than the z -score for the woman, so he is relatively taller. B. The z-score for the man, , is smaller than the z-score for the woman, so he is relatively taller. C. The z-score for the woman, , is smaller than the z-score for the man so she is relatively taller. D. The z-score for the woman, , is larger than the z-score for the man, so she is relatively taller.

This nerve transmits sensory impulses involving equilibrium.

As the block slides down the ramp, what happens to its kinetic energy K, potential energy U, and total mechanical energy E? K decreases, U increases E stays the same K decreases, U increases E increases K increases; U increases; E increases increases E decreases E stays the same

Using Equation 2, calculate the areas of each triangle using the bases and heights you measured. The percent difference between the areas is calculated using the following formula. (Note the absolute value bars in the numerator.) percent difference = 2 × area 1 -area 2 / (area 1 +area 2) × 100 Calculate the percent difference. Because of limited precision of the measurements, if the areas are within 10% of each other, we can consider them about the same. Kepler's Laws Lab Worksheet This sheet is to show work and calculations related to particular questions. Your work should be correct and consistent with the answers you submit in Canvas. To show work, you don't have to recopy any formulas, but you DO need to show the formulas written with your numbers substituted in and your calculated answer. Include the proper units with all your answers. Work leading up to Question 2 Show your calculations for the triangle areas using Equation 2. (units are mm^2)

Part B Now, consider the collision between two happy balls described in Part A. How much of the balls' kinetic energy is dissipated? View Available Hint(s) None of it Half of it All of it : Submit Next>

9) Which of the following descriptions of a subatomic particle is correct? A) A proton has a positive charge and a mass of approximately 1 amu . B) An electron has a negative charge and a mass of approximately 1 amu . C) A neutron has no charge and its mass is negligible. D) A proton has a positive charge and a negligible mass. E) A neutron has a positive charge and a mass of approximately 1 amu .

Athletic wear made by Under Armour is undergoing a change as the manufacturer focuses on a "local for local" initiative as it finds ways to bring manufacturing jobs back to the United States. The actions taken by Under Armour demonstrate the concept of franchising, reshoring, licensing, offshoring.

When an object is dropped on a certain earth-like planet, the distance it falls in t seconds, assuming that air resistance is negligible, is given by s(t) = 19t^2 where s(t) is in feet. Suppose that a medic's reflex hammer is dropped from a hovering helicopter. Find (a) how far the hammer falls in 4 sec, (b) how fast the hammer is traveling 4 sec after being dropped, and (c) the hammer's acceleration after it has been falling for 4 sec. (a) The hammer falls 304 feet in 4 seconds. (Simplify your answer.) (b) The hammer is traveling [] ft/sec 4 seconds after being dropped. (Simplify your answer.)

Multiple Select Question Select all that apply Following the 1896 election, what steps did President William McKinley take regarding Cuba? He called on American sugar interests to withdraw from Cuba. He applied diplomatic pressure on Spain to quit Cuba. He asked Congress to declare war on Spain. He secretly planned for war with Spain.

An object travels in a circle of radius r at constant speed v. a. By what factor does the object's acceleration change if its speed is doubled and the radius is unchanged? b. By what factor does the acceleration change if the radius of the circle is doubled and its speed is unchanged?

7. What characteristic best describes what happen during a physical change?

Divide the numerator and the denominator by the highest power of (x) in the denominator and proceed from there. Find the limit. Write (infty) or (-infty) where appropriate. (lim x rightarrow-infty fracsqrt[3]x-3 x+52 x+x^2/3-7) (lim x rightarrow-infty fracsqrt[3]x-3 x+52 x+x^2/3-7=)

Find the center of mass of the lamina in the following figure if the circular portion of the lamina has twice the density of the square portion of the lamina.

At what points is the following function continuous? f(x) = sqrt(2x + 3) The set of x-values where the function is continuous is . (Simplify your answer. Type your answer in interval notation.)

A radio transmission tower is 140 feet tall. How long should a guy wire be if it is to be attached 8 feet from the top and is to make an angle of 25° with the ground? Give your answer to the nearest tenth of a foot.

If a wavelength of 1 / 2 mm is traveling through soft tissue, what is the approximate frequency? 3.08 MHz 1.54 MHz .77 MHz .38 MHz

lim as h approaches 0 of ((x+h)/(x+h)-5) - (x/(x-5))/h

3. If your friend drops a chocolate bar to you from a height of 5.0 m above your hands, (a) How long would it take you to catch it? Use Eq. 2. height = 5.0 m initial (0, ? ) h = V1 t + 1 / 2 g = 9.8 m / s^2 t = sqrt(2 h / 9) t = sqrt(2 * 5.0 m) / 9.8 m / s^2 ≈ 1.0102 s t = sqrt(1.8 / 9 .8) t = sqrt(1.0204) (b) With what speed will the chocolate bar strike your hands? Use Eq. 3. g = 9.8 m / s^2 ≈ 1.0102 s h = 5.0 m v = g t → 9.9 m / s^2 × 1.01025 ≈ 9.8996 mb (c) In the previous part, what would the speed equal if you had incorrectly used Eq. 1 instead? (d) Why is using Eq. 1 incorrect in this problem?

Given r(t) = t i + t^2 j + t k, find the binormal vector B(0). Write your answer using standard unit vector notation.

find an equation for the surface consisting of all points P for which the distance from P to the *-axis is twice the distance from P to the yz-plane. Identify the surface.

The net electric force acting on each of the three objects below is sketched as a green arrow. For example, if the green arrow points to the left the object feels a net electric force pushing it to the left. If there is no green arrow, the object feels no net electric force. Use this information to assign an electric charge to each object. That is, decide whether each object has a positive electric charge, a negative electric charge, or is neutral. Note for advanced students: there may be more than one correct answer. (0)

Find the horizontal and vertical asymptotes of the following curve. Be sure to use a limit statement to explain why there is an asymptote, or why is not an asymptote. y=(x^2-3 x^3)/(2 x^3-8 x)

4 1 point What is the reversal potential of an ion channel? The voltage at which ion flow through the channel changes direction The voltage at which an action potential is generated The voltage that triggers neurotransmitter release The resting membrane potential of a neuron

Find the volume of the solid generated by revolving the region bounded by the given curve and lines about the y-axis. x=3/(sqrt(y+1)), x=0 ; y=0, y=2 V= (Type an exact answer, using pi as needed:)

A fan on a scale is blowing air upwards. Select the direction of each external force acting on the highlighted object. Only include forces in the plane of the page. weight (W) : normal force (N): tension (T) : friction (f) : drag (D): thrust (Th) / applied (A):

2. Consider the following two scenarios - An individual attempts to lift a 25 lb weight in full elbow extension and is unable to move it. They then attempt to lift the same weight at 90 degrees of elbow flexion and they are able to move it. a. What type of contraction is occurring in scenario one (unable to move weight) and what forces are involved? b. What is one topic we've discussed in class that might explain why the individual is able to move the weight in the second scenario?

A bee with a velocity vector r'(t) starts out at (12,-5,14) at t=0 and flies around for 1 second. Where is the bee located at time t=1 if ∫ from 0 to 1 r'(u) du = 0

Based on the diagram below, what is the average velocity of the object if it starts at position A, then goes to B, then goes to C, if this all took 53.15 s to happen.

The region bounded by f(x)=-3 x^2+9 x+54, x=0, and y=0 is rotated about the y-axis. Find the volume of the solid of revolution. Find the exact value; write answer without decimals.

Question 9 12 pts Consider the definite integral ∫ f(x)/√g(x) dx where f(x)=x and g(x)=15-2x-x^2. a. Rewrite √g(x) in the form of √(b^2-(x+a)^2). b. Use a trigonometric substitution to evaluate the indefinite integral. Be sure to draw the right triangle and express your final answer in terms of x as much as possible. You must show all steps.

Consider a charge in the presence of a magnetic field. When does it experience a force from that field? (A) Only if the charge is moving (B) Always (C) Only if the charge is not moving (D) Never

What potential difference is needed to give a helium nucleus (Q=3.2 × 10^-19 C) 132 keV of kinetic energy? Express your answer using two significant figures.

What is the ratio of the centripetal acceleration of a point on the end of the rod to that of a point a distance L / 2 from the end of the rod?

Determine la pendiente de la recta tangente a la gráfica de la función y=ln sqrt3 x-5, en el punto de ordenada y=0. 3 / 2 1 / 3 2 -3 / 10

Use the figure below to find the exact value of the trigonometric function of angle A. cot (A)

The energy E of the electron in a hydrogen atom can be calculated from the Bohr formula: E = -Ry / n^2 In this equation Ry stands for the Rydberg energy, and n stands for the principal quantum number of the orbital that holds the electron. (You can find the value of the Rydberg energy using the Data button on the ALEKS toolbar.) Calculate the wavelength of the line in the absorption line spectrum of hydrogen caused by the transition of the electron from an orbital with n=7 to an orbital with n=12. Round your answer to 3 significant digits. m

If you have problems falling asleep at night, could be the culprit.

Use the product rule to find the derivative of the given function. Find the derivative by expanding the product first. h(z)=(7-z^2)(z^3-4 z+2) a. Use the product rule to find the derivative of the given function. Select the correct answer below and fill in the answer box(es) to complete your choice A. The derivative is (z^3-4 z+2)(). B. The derivative is (7-z^2)(z^3-4 z+2)(). C. The derivative is (7-z^2)(()+((z^3-4 z+2)())). D. The derivative is (7-z^2)(z^3-4 z+2)+(). E. The derivative is (7-z^2)().

d. Would the Physics student be moving? If yes, is he accelerating? e. What would happen if the wall stopped exerting any force?

Rocks are folded. Horizontal rocks are deposited over eroded tilted beds. Rocks are deposited horizontally.

Look at this diagram: If R T and U W are parallel lines and m angle TSV = 128 degrees, what is m angle WVS?

What is the lightest stage of sleep? Stage II Stage I Stage III

Question 2 1 pts Based on your knowledge of scientific laws and theories, which of the following is true? A theory is supported by a single researcher, and laws must be supported by separate groups of researchers. A theory is an explanation for a broader concept than a law. A theory can never change, while a law changes often. A theory can turn into a law with more scientific evidence.

d/dx (1/(3x-1)^5) =

Referring to the figure, you walk from your home to the library, then to the park. (Figure 1) What is the distance traveled? What is your displacement?

An object moves along a horizontal coordinate line in such a way that its position at time t is specified by s=t^3-12t^2+45t+9. Here s is measured in feet and t in seconds. (a) When is the velocity 0 ? t= 3 5 or t> (b) When is the velocity positive? t< 3 <t< (c) When is the object moving to the left (that is, in the negative direction)? 5 (d) When is the acceleration positive? t> 3

Two objects A and B accelerate from rest with the same constant acceleration. Object A accelerates for twice as much time as object B, however. Which one of the following statements is true concerning these objects at the end of their respective periods of acceleration? A) Object A will travel twice as far as object B. B) Object A will travel four times as far as object B. C) Object A will travel eight times further than object B. D) Object A will be moving four times faster than object B. B) Object A will be moving eight times faster than object B.

Which of the following ^1H NMR signals would the NMR spectrum of this molecule show? 3 H signal at 7-8 ppm 3 H signal at 3-4 ppm 1 H signal at 9-10 ppm

Problem 13: (4% of Assignment Value) A graph of velocity versus time is shown. Which of the following graphs best represents an acceleration curve that is consistent with the above velocity curve? The horizontal axes are scaled identically.

A Windy Day in a Boat Due in 5 hours, 3 minutes A boat has a mass of 6731 kg. Its engines generate a drive force of 4037 N, due west, while the wind exerts a force of 775 N, due east, and the water exerts a resistive force of 1210 N due east. What is the magnitude of the boat's acceleration? Submit Answer Tries 0/10

A ball of mass 775 g hangs from a spring whose stiffness is 170 newtons per meter. A string is attached to the ball and you are pulling the string to the right, so that the ball hangs motionless, as shown in the figure. In this situation the spring is stretched, and its length is 15 cm. What would be the relaxed length of the spring, if it were detached from the ball and laid on a table?

4 / 10 Correct Decide which of the following statements are true. There are an unlimited number of normal distributions. The y-axis is a vertical asymptote for all normal distributions. The total area under a normal distribution curve with a standard deviation of 4 is the same as the area under a normal distribution curve with a standard deviation of 12 Normal distributions are bell-shaped, but they do not have to be symmetric.

A piano has been pushed to the top of the ramp at the back of a moving van. The workers think it is safe, but as they walk away, it begins to roll down the ramp. Neglect the friction between the piano and the ramp.

A dragster starts from rest and accelerates at 29 m / s^2. How fast is it going after t=4.0 sec ?

A photon has a frequency of 3.80 × 10^7 Hz. Calculate the energy (in joules) of 1 mole of photons with this frequency. Be sure your answer has the correct number of significant digits.

Part 1 (1 point) Which metal emits electrons with the greater velocity? Part 2 (1 point) What is the velocity of the electrons from potassium? m / s Part 3 (1 point) What is the velocity of the electrons from sodium? m / s

The center of mass moves with constant acceleration when constant forces act on the object. A gymnast jumps straight up, with her center of mass rising at 1.80 m/s at the top of her jump. Ignore the effects of air resistance, and assume the initial height of her center of mass is zero. (Ignore the effects of air resistance, and assume the initial height of her center of mass is zero.) (a) 0.100 s (b) 0.200 s (c) 0.300 s (d) 0.500 s

Let w(x, y, z) = sqrt(x^2 + y^2 + z^2) where x = 5re^t, y = 2te^r z = e^rt Calculate the partial w / partial r the partial w / partial t by first finding the partial x / partial r, the partial y / partial r, the partial z / partial r, the partial x / partial t, the partial y / partial t the partial z / partial t and using the chain rule. the partial w / partial r = square the partial w / partial t = square

You hold your hands next to a fire, and feel bursts of heat as the flame flickers. This is an example of which mode of heat transfer? Radiation Conduction Convection

A plane takes off with a 35.1 m/s velocity after it advanced 1233.6 m of the road, if the plane was totally still at the beginning. Calculate the acceleration of the plane.

111 point The sun primarily gives off UV radiation and the Earth primarily gives off IR radiation. True False Previous

Find the horizontal and vertical asymptotes. f(x)=(7x^2+36)/(x^2-36)

Um peixe se mantém na mesma profundidade na água doce ajustando a quantidade de ar em ossos porosos ou em bolsas de ar para tornar sua massa específica média igual à da água. Suponha que, com as bolsas de ar vazias, um peixe tem uma massa especifica de 1,05 g / cm^3. Qual a fração entre o volume inflado e o volume da bolsa cheia para tornar sua massa específica igual à da água?

Determine the temperature, in K, of oxygen (O₂) at 250 bar and a specific volume of 0.003 m³/kg using generalized compressibility data and compare with the value obtained using the ideal gas model.

How does the magnitude of acceleration of the rifle compare with the magnitude of acceleration of the bullet, and why?

A runner completed a marathon in 3 hours and 34 minutes. What was her average speed, in meters per second? 1 marathon = 26.2 miles. 1 mile = 1.609 kilometers. 3.91 meters / second 1.27 meters / second 3.28 meters / second 7.34 meters / second

Determine which of the following subsets of R^3 are sub-spaces. If so, prove it, if not, specify which conditions of a sub-space are violated. a. Vectors of the form: [a b 0] b. Vectors of the form: [a b 1] c. Vectors of the form: [a b c] where a+b+c=0 d. Vectors of the form: [a b c] where ab=c^2 e. Vectors of the form: [a b c] where c >= 0 f. Vectors of the form: [a b c] where a-2b=0 and a+2c=0

A model rocket is launched with an initial upward velocity of 151 ft/s. The rocket's height (in feet) after t seconds is given by the following equation: h = 151t - 16t^2 Find all values of t for which the rocket's height is 88 feet. (If there is more than one answer, use the "or" button.) t = [] seconds x ground

2 Points At divergent plate boundaries: (A) plates move apart and new lithosphere is formed (B) plates come together and new lithosphere is formed (C) plates slide horizontally past each other (D) none of the other answers is correct (E) plates come together and one plate is recycled into the mantle

Question 10 2 Points Convergent plate boundaries are marked by: (A) mountain building (B) deep-sea trenches (C) volcanism (D) earthquakes (E) all of the other answers combined!

Basic Skills and Concepts Statistical Literacy and Critical Thinking 1. McDonald's Dinner Service Times Refer to the accompanying table summarizing service times (seconds) of McDonald's dinners. How many individuals are included in the summary? Is it possible to identify the exact values of all of the original service times? 2. McDonald's Dinner Service Times Refer to the accompanying frequency distribution. What problem would be created by using classes of 60-120,120-180, ..., 300-360? 3. Relative Frequency Distribution Use percentages to construct the relative frequency distribution corresponding to the accompanying frequency distribution for McDonald's dinner service times. 4. What's Wrong? Heights of adult males are known to have a normal distribution, as described in this section. A researcher claims to have randomly selected adult males and measured their heights with the resulting relative frequency distribution as shown here. Identify two major flaws with these results.

Evan throws a ball up in the air. The graph below shows the height of the ball h in meters after t seconds. After how many seconds does the ball hit the ground?

Multiple Choice Question Scientists identify substances that readily give up hydrogen ions in water as and substances that readily bond with hydrogen ions are or alkaline substances. O organic compounds; molecules O acids; bases O bases; acids

Which moon of Jupiter is believed to have a liquid ocean beneath a layer of ice? a) Io b) Europa c) Callisto d) Ganymede

Angle Measure Conversion Degrees Gradients -180 -200 -90 -100 0 0 90 100 180 200 270 300 Engineers measure angles in gradients, which are smaller than degrees. The table shows the conversion of some angle measures in degrees to angles in gradients. What is the slope of the line representing the conversion of degrees to gradients? Express your answer as a decimal rounded to the nearest hundredth.

Two cars are moving around a flat curved road, each having the speed of 15 m/s, but moving in the opposite direction from each other. If the radius of the track is 80 m, what are their centripetal accelerations? - both have the same acceleration of 2.81 m/s^2, and directed towards the center of the curve - one has an acceleration of 1.38 m/s^2, directed towards tangential to the curve, and the other has an acceleration of -1.38 m/s^2, directed away from the center - one has an acceleration of 2.81 m/s^2, directed towards the center of the curve, and the other has an acceleration of -2.81 m/s^2, directed tangential to the curve - both have an acceleration of 1.38 m/s^2, directed towards the center of the road

Two blocks connected by a rope of negligible mass are being dragged by a force at a 32° angle above horizontal, so that the blocks are already moving to the right. Suppose F=75.0 N, m1=10.0 kg, m2=16.0 kg, and the coefficient of kinetic friction between each block and the surface is 0.150. Use g=9.8 m/s^2. m1 m2 F (b) Determine the acceleration of the system. 1.21 m/s^2 (c) Determine the tension T in the rope. 13.91 × N

Calorimetry Thermodynamics A 5.00 kg block of metal with c=650 J /(kg*C) at 80.0°C comes in contact with a 1.25 kg glass block at 20.0°C. They come to equilibrium at 63.9°C. What is the specific heat of the glass? (Unit =J /(kg*C))

Given: ∠ABC ≅ ∠DEF and ∠GHI ≅ ∠DEF Prove: m∠ABC = m∠GHI Enter Reasons m∠GHI = ∠ABC ∠DEF ∠GHI Statements 1. ∠GHI ≅ ∠DEF 2. ∠ABC ≅ ∠DEF Reasons 1. given 2. given

A pendulum swings back and forth. Choose the bar graphs that best represent the energy flow from highest point where it starts moving on the * 1 point left side to the lowest point of the swing at the center. Pendulum A B

Consider the lines that contain the segments in the figure and the planes that contain the faces of the figure. Choose the pairs of skew lines. EF and FG BC and CD CD and BG EF and AH

Question 6, 4.3.17 The following data represent the number of calories per serving and the number of g of high-fiber cereals. Complete parts (a) through (d) below. Calories, x 220 240 150 190 180 Sugar, y 16 15 17 17 13 (a) A scatter diagram of the data is shown. What type of relation appears to exist between calories and sugar content? A. There appears to be little or no relationship between calories and sugar content. B. There appears to be a strong linear relationship between calories and sugar content. C. There appears to be a strong nonlinear relationship between calories and sugar content. (b) Determine the correlation coefficient between calories and sugar content. The correlation coefficient is -0.204.

Decide how the sketches below would be listed, if they were listed in order of decreasing force between the charges. That is, select "1" beside the sketch with the strongest force between the charges, select "2" beside the sketch with the next strongest force between the charges, and so on. Note for advanced students: since the units of each charge are not written, you may assume any convenient and reasonable unit, for example coulombs or multiples of e.

A coin, thrown upward at time t=0 from an office in the Empire State Building, has height in feet above the ground t seconds later given by h(t)=-16 t^2+48 t+448=-16(t-7)(t+4) (a) From what height is the coin thrown? Include units in your answer. (b) At what time does the coin hit the ground? Include units in your answer.

What type of graph should be used? Graph the temperature and precipitation data for San Francisco. Can both sets of data be plotted on the same graph? What will go on the x axis? How should the x axis be labeled? What should go on the y axis? What is the range of values on the temperature axis? -19+0+34 How should this axis be labeled? What is the range of values on the precipitation axis? How should this axis be labeled? What type of graph should be used?

Using the graph, complete the table that follows by indicating whether each statement is true or false. (H clicking on the points.) Statement - Between points A and E, curve HH is perfectly inelastic. - Between points A and C, curve KK is elastic. - Curve KK is more elastic between points A and C than curve JJ is between points A and D.

A box initially at rest, is pushed with a force of 16.3 N at a 41.0° angle over a distance of 9.32 m. A frictional force of 6.23 N is exerted back onto the box. What is the total amount of work done? w=[?] J

2.25 mi

What force must be exerted on the master cylinder of a hydraulic lift to support the weight of a 2000-kg car (a large car) resting on a second cylinder? The master cylinder has a 2.00-cm diameter and the second cylinder has a 24.0-cm diameter.

3.3.3 Quiz: Graphs of Functions Sam is rowing a boat away from a dock. The graph shows the relationship between time and Sam's distance from the dock. Evaluate the function for an input of 6 .

LTI system starts at rest (no stored values) and has an impulse response h[n] = 1.25δ[n] − 0.5δ[n − 1] + δ[n − 3] and an input signal x[n] = 10 cos(0.25πn + 15o) (u[n − 1] − u[n − 3)) Find a closed form (analytic expression) for the output of the sys

Write the equation 2x+3y=9 in slope-intercept form.

What is the uncertainty in the velocity of an electron if it is known to be located within 1.0 × 10^-10 m?

Suppose that eleven adolescent mice are weighed, in grams, and their corresponding relative fitness is determined, with the results shown in the table below. a) Plot the data in Desmos and run a linear regression. Write the linear selection function in the form (w(z)=alpha+beta z), along with the correlation coefficient (r). b) What is an approximate meaningful domain for the function in part (a)? Why? Weight (grams) Relative fitness 4.7 0.26 8.6 0.62 10.2 0.78 5 0.32 4.6 0.28 6.9 0.51 11.5 0.71 5.9 0.52 7 0.5 13.1 0.74 8.2 0.75

If a car is climbing a hill at a 15° angle, how many horizontal feet will the car travel every 1,000 feet of road if the car gains 259 feet of vertical feet? Round your answer to the nearest foot.

Question 4, 2.3.19 HW Score: 12.35%, 2.1 of 17 points Part 2 of 5 Points: 0 of 1 Use the graph of the function f shown to estimate the indicated quantities to the nearest integer. Complete parts a through e. a. Find the limit lim f(x). Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. lim x -> 2- f(x)=4 B. The limit does not exist. b. Find the limit lim x -> 2- f(x). Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. lim x -> 2+ f(x)= B. The limit does not exist.

√v(-v^2)

A 46.0-m guy wire is attached to the top of a 33.4-m antenna and to a point on the ground. How far is the point on the ground from the base of the antenna, and what angle does the guy wire make with the ground? The point on the ground is meters away. (Round to the nearest tenth as needed.)

8. [Laboratório Virtual - Ângulo Limite] Com relação aos instrumentos de medida utilizados em atividades experimentais, dependendo da precisão necessária a uma determinada medida é que escolhemos o aparelho mais adequado para efetuá-la. Durante o experimento, faz-se uso do transferidor, que é uma régua especial, Sobre a finalidade desse instrumento de medida para a realização da prática virtual, assinale a alternativa CORRETA: A. ( ) Possibilitar a medição dos ângulos dos raios incidente e refratado. B. ( ) Dispersar os raios luminosos. C. ( ) Produzir o feixe de luz. D. ( ) Refratar a luz produzida.

Exercicio: 1/5 - Ondas eletromagnéticas são descritas matematicamente por equações diferenciais parciais de segunda ordem. As soluções dessas equações são campos elétricos que oscilam no tempo. Muitas vezes, esses campos são denominados campos harmônicos no tempo. A partir dessas informações e do conteúdo estudado sobre equações de Maxwell, mi. Dizer que um material é dielétrico equivale dizer que é um material condutor de eletricidade. Em meios lineares, o campo magnético é dado como um múltiplo do vetor deslocamento elétrico. A suscetibilidade magnética é uma quantidade geométrica. Um material em uma região contendo campo magnético externo sofre o efeito de magnetização. Uma amostra desse material pode ser vista como muitas espiras pequenas cuja corrente é anulada pela corrente no sentido contrário. Segundo a Lei de Ampère na presença de materiais, o campo auxiliar H é idêntico ao campo magnético B em meios materiais.

If p represents the focus of the parabola, which of the following expressions is used to represent the focal width? a. p b. 4p c. 2p d. 4px

A vertical tower 132.0 ft high is anchored to the ground by guy wires as shown in the figure. How long (in ft ) is each guy wire? (Round your answers using the rules for working with measurements.)

What is the wavelength of a 60 mHz wave that travels at 400 m / s ? 1000 mHz=1 Hz

Calculate the answer and round to the correct number of significant digits. 15.4 ÷ 1.634 [?] 9.425 9 9.42 9.4

Which internet protocol is used to transmit encrypted data? FTP HTTPS HTTP TCP/IP I want to review this question later. (Optional) Check my answer (Optional)

A football is kicked at ground level with a speed of 17.6 m / s at an angle of 43.7° to the horizontal. Part A How much later does it hit the ground? Express your answer using three significant figures and include the appropriate units. t=Value s

For the function f(x)=3x^2+9x^3-5x Find the equation of the tangent line at x=-4.

Some os vetores. (1 Point) vec(u) e vec(s) 4,8 i+29 j 29 i+4,8 j 29 i-4,8 j -4,8 i+29 j

Which species is the conjugate acid of HCO3^-? A) CO3^2- B) H2CO3 C) H2O D) CO2

A compression ignition engine when tested gave an indicator card having area 2950 mm^2 and length 68 mm. The calibration factor was 0.2 bar / mm. The mechanical efficiency of the engine was 80%. Calculate the IMEP and the BMEP.

HW 04 - Class 08 Vectors Problems 1-3: The first three problems below exist in the 2D rectangular coordinate system (xy-plane), with a horizontal x-axis and vertical y-axis. Positive angles measure clockwise from the (+) x-axis. All forces are in Newtons (N). a) Draw a sketch of the applied forces and resultant force vector R. b) Give your result for R in both rectangular and polar notations. 1. Find the magnitude and direction of the force vector R that results from two applied forces: A=8 N at 90 degrees B=12 N at 0 degrees

Problem 2: (9% of Assignment Value) In this problem a heat engine, each cycle, absorbs an amount of energy Qh=1780 J from a hot reservoir and expels an amount Qc=1310 J into a cold reservoir. Each cycle lasts for a time of t=0.23 seconds. Part (a) Find the efficiency of an ideal engine operating between these reservoirs. Remember the efficiency is unit-less, therefore so should your number be. eideal =

c:Does the age of rocks of the ocean floor get older or younger the farther they are from the spreading plate boundaries?

How many minutes (min) will it take for a car that is moving at 5.4 × 10 mi / h to travel 250. km?

Situação de Avaliação NOTAS: 1. PESO DAS QUESTÕES Os valores referentes ao peso de cada questão encontram-se indicado ao lado da mesma. A nota final é a soma de os pesos. 2. RESPOSTAS ÀS QUESTÕES 2.1. Questões objetivas Para cada uma das questões objetivas, são apresentadas 4(quatro) alternativas classificadas com as letras (c (c) e, (d) só uma responde adequadamente ao quesito proposto. 2.2. Questões discursivas Para cada uma das questões discursivas serão exigidos dominio técnico e sequência lógica de informações 2.3. Questões práticas Todas as questões práticas são acompanhadas de lista de verificação. 3. RECUPERAÇÃO Serão oportunizadas ações de recuperação paralela (parcial) caso o ponto obtido na questão seja inferior ao seu Calcule a corrente elétrica de um chuveiro cuja potência é de 5.500 Watts e a tensão ou diferença de potencial de 2 Descreva a lei das cargas elétricas. A) Cargas +/+ se atraem, -/+ se atraem. B) Cargas +/ - se atraem, -/ - se repelem. C) Cargas + - se repelem, +/+ se repelem D) Cargas +/+ se repelem, -/+ se repelem. Qual o símbolo da unidade de medida da DDP (diferença de potencial)? A) A (ampere) B) Ω (Ohm) C) V (volt) D) W (watts) Assinale a alternativa que apresenta corretamente três grandezas elétricas. A) V-Corrente elétrica, A - DDP, Ω - Resistência. B) V-DDP, A - Corrente Elétrica, Ω - Resistência.

Find all points having an x-coordinate of 1 whose distance from the point (-3,-2) is 5. The point(s) is(are) . (Type an ordered pair. Use a comma to separate answers as needed.)

A new coal-burning power plant can generate 2.1 gigawatts (billion watts) of power. Burning 1 kilogram of coal yields about 445 kilowatt-hours of energy. Complete parts (a), (b), and (c) below. a. How much energy, in kilowatt-hours, can the plant generate each month? The plant can generate 1,512 million kilowatt-hours of energy each month. (Type an integer.) b. How much coal, in kilograms, is needed by this power plant each month? The plant needs million kilograms of coal each month. (Round to one decimal place as needed.)

Durch einen PT100 (Temperaturkoeffizient α= 3,85 x 10^-3 / K ; 0°C=100 Ω ) fließt ein Strom von 0,8 mA. Wie hoch ist der Spannungsfall am Sensor bei 30°C ? (1) 11,6 mV (2) 80,0 mV (3) 89,2 mV (4) 110,8 mV (5) 111.6 mV

(d) dx/dt = 2tx + 4e^(-t^2), x(0) = 10.

Under local regulation, particles larger than 5 μm (0.0005 cm) in diameter cannot be discharged to the stream. How long after runoff stops entering the retention pond can water be discharged to the stream from the upper 50 cm of the retention pond? Use the same η and ρw as in part a.

Part 2 Suppose that a current of 1.5 A is used to charge a conductor. After 4.0 s, how much charge is delivered to the conductor. 2.7 V 6.0 C 6.0 V 2.7 C

A moon rock collected by a U.S. Apollo mission is estimated to be 3.50 billion years old by uranium/lead dating. Assuming that the rock did not contain any lead when it was formed, what is the current mass of ^206 Pb in the rock, if it currently contains 1.115 g of ^238 U? The half-life of ^238 U is 4.47 x 10^9 years. ^206 Pb mass: g

Find the volume of the solid obtained by rotating the region bounded by the curve f(x) = e^(3x)/6, the x-axis, the y-axis, and the line x=1 around the y-axis. Submit an exact answer. Provide your answer below: Volume = (π/27)(2e^3+1)

Increasing the production of a good requires larger and larger decreases in the production of another. What are the implications of this idea for the shape of the production possibilities frontier? A. The production possibilities frontier will be a straight line. B. The production possibilities frontier will be bowed outward. C. The production possibilities frontier will have a positive slope. D. The production possibilities frontier will have a negative slope. E. The production possibilities frontier will be bowed inward.

Q1. An electric dipole, consisting of two equal and opposite point charges at the ends of an insulating rod, sits in the electric field of a stationary positive point charge, as shown. The dipole is free to move. After the dipole is released from rest it will... A. initially rotate clockwise, and once the dipole is aligned with the field it will accelerate to the right B. initially rotate clockwise, and once the dipole is aligned with the field it will accelerate to the left C. initially rotate clockwise, and once the dipole is aligned with the field it will not accelerate move left or right D. initially rotate counterclockwise, and once the dipole is aligned opposite the field it will accelerate to the right E. initially rotate counterclockwise, and once the dipole is aligned opposite the field it will accelerate to the left

An object travels east for 500 m at a speed of 25 m / s and then west for 800 m at 16 m / s. a. What was the distance traveled by the object? (1300 m) b. What was the final displacement of the object? (300 m west) c. What was the average speed of the object? (18.6 m / s)

Use the given conditions to write an equation for the line in point-slope form and slope-intercept form. Passing through (-3,-3) and (3,7) Type the point-slope form of the equation of the line. (Use integers or simplified fractions for any numbers in the equation.) Type the slope-intercept form of the equation of the line. (Use integers or simplified fractions for any numbers in the equation.)

Determine whether the association between the two variables is positive or negative. The weight of a car (in pounds) and its fuel efficiency (in miles per gallon)

A 11 kg object is moving in a straight-line with an initial speed of 8.8 m / s. What work (in J) must be done on the object for the object's speed to decrease to 3.3 m / s?

Find the area under the standard normal curve between the given z-values. Round your answer to four decimal places, if necessary. z1=-1.57, quad z2=1.57

3. A boy stands at the edge of a 25.0 m cliff and tosses a baseball straight upward with an initial speed of 22.0 m / s. Ignore the effects of air resistance. (a) How high will the ball go above the cliff edge? (b) What is the acceleration of the ball when it is at its maximum height? (c) Determine the position of the ball 4.70 s after it is thrown. Is the ball above or below the cliff edge at this time? (d) What is the velocity of the ball immediately before it impacts the ground at the base of the cliff?

Quantum computing is a type of computing that uses quantum-mechanical phenomena, such as superposition and entanglement, to perform operations on data. Though it sounds more science fiction than fact, experimental quantum computers have already demonstrated capabilities surpassing those of traditional computers in specific tasks. experts generally agree that fully operational quantum computers, capable of handling a broad range of real-world applications, remain years away. Which choice completes the text with the most logical transition? Choose 1 answer: (A) Moreover, (B) However, (C) Consequently, (D) In other words

Two objects are pulled vertically upward against gravity as shown. Determine the acceleration of the objects for m₁=6.0 kg, m₂=4.0 kg and F=150 N.

QUESTION 11 Which system(s) form the communication or "feedback" loops to maintain homeostasis? endocrine system nervous system both a b neither a nor b

Lesson Detail My iCEV BUSIM2-08-ADCOCK login.icevonline.com/mycourses/BLOADCOC148/lesson/1117//CEV/085302A! ehallpass Spotify - Web Player... Pinterest ssessment - Microsoft(®) Word 2016 Advanced - Unit 2 crosoft Word 2016 Advanced - Unit 2 2 of 5 Which of the following tabs must be added to the Ribbon in order to add controls to forms? Form Developer Controls Template 924 - All Rights Reserved. (wn1mdwk00014D)

Three charged particles are placed at the corners of an equilateral triangle of side 1.20 m. The charges are +7.0 μC, -8.0 μC, and -6.0 μC. Calculate the magnitude and direction of the net force on each due to the other two.

An object is moving with constant non-zero velocity in the +x direction. The velocity versus time graph of this object is a straight line making an angle with the time axis, a vertical straight line, a horizontal straight line, or a parabolic curve.

The bar graph gives the average atmospheric concentration of carbon dioxide. a. Estimate the yearly increase in the average atmospheric concentration of carbon dioxide. Express the answer in parts per million. b. Write a mathematical model that estimates the average atmospheric concentration of carbon dioxide, C, in parts per million, x years after 1950. c. If the trend shown by the data continues, use your mathematical model from part (b) to project the average atmospheric concentration of carbon dioxide in 2025.

Question 6 Ignoring air resistance, the velocity of a falling object depends on the mass of the object. increases for a while, then becomes constant. is constant. is constantly increasing.

Marque as alternativas que especificam o valor da seção mínima recomendada do cabo condutor para a instalação do chuveiro. Escolha uma ou mais: Máxima queda de tensão 2,5 mm² capacidade de condução de corrente 6 mm² capacidade de condução de corrente 10 mm² Mínima seção normalizada 10 mm² Máxima queda de tensão 6 mm² Mínima seção normalizada 2,5 mm²

A peregrine falcon dives at a pigeon. The falcon starts downward from rest with free-fall acceleration. If the pigeon is 76.0 m below the initial position of the falcon, how long does the falcon take to reach the pigeon? a. 3.9 s b. 15.5 s c. 2.8 s d. 7.8 s

Weight 1848 lbs Size : 3 ft × 4 ft × 5 ft What is the density of this object?

Analyze the trend of nuclear power plant capacity over time: Year Percent 1975 56 1980 59 1985 58 1990 70 1995 76 2000 88 2004 89 Let f(t) be the capacity (in percent) at which U.S. nuclear power plants are working at t years since 1970. A model of the situation is f(t)=0.027 t^2+0.216 t+53.296.

4 b̂ 4x-5 BL 4x+15 C Given: M∠ABC=90 x= (4x-5)+(4x+15)=90 8x+10=90 -10-10

At a point on the ground 15 ft from the base of a tree, the distance to the top of the tree is 1 ft more than 2 times the height of the tree. Find the height of the tree. The height of the tree is ft . (Simplify your answer. Round to the nearest foot as needed.)

Problem 3 Thelma stands on top of a building whose height is H and throws a ball upward. The speed of the ball when it leaves her hand is vT, where the subscript stands for both Thelma and top. Bob is standing at the bottom of the building and at the same instant throws another ball upwards with speed vB. What is the slowest that vB can be if Bob's ball hits Thelma's when Thelma's ball is still on the way up? Express your answer in terms of gravitational acceleration g, H, and vT. (I would recommend that you draw a picture.)

What water would be the least dense? Freshwater at 8°C Freshwater at 1°C Freshwater at 6°C Freshwater at 20°C

The diameter of a cylindrical construction pipe is 7 ft. If the pipe is 39 ft long, what is its volume? Use the value 3.14 for π, and round your answer to the nearest whole number. Be sure to include the correct unit in your answer.

Question 67 ot yet answered Points out of 1.00 Flag question The most stable layer, in terms of temperature and density, is the mixed layer. Select one: True False

1. Un objeto de 4.0 cm de altura esta frente a una lente convergente, cuya distancia focal es de 22 cm. El objeto está a 15 cm de la lente. a) Con un diagrama de rayos, determine si la imagen es 1) real o virtual, 2) derecha o invertida y 3) mayor o menor que el objeto. b) Calcule la distancia a la imagen y el aumento lateral.

Plot two points on the boundary line of the graph of the line x, y=1, 1

Assume that the readings at freezing on a bundle of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermometer is randomly selected and tested. Find the probability of obtaining a reading greater than 0.955°C. P(Z>0.955)=

speeds over 200 miles per hour. Assuming a particular peregrine falcon dives at a speed of 200 miles per hour, how long will it take to reach the ground if it dives from a height of 330 feet? Hint: There are 5,280 feet in 1 mile. Write your answer as a whole number, a decimal, or a simplified fraction or mixed number. Do not round. seconds

Albert Einstein ist es gelungen, den Fotoeffekt mithilfe des Teilchencharakters von Licht zu erklären. Die bei diesem Vorgang umgesetzte Energie lässt sich auf zwei Weisen darstellen: EPhoton =h cdot f (2) EElektron =Ekin +EA (f: Frequenz; h : Planck'sches Wirkungsquantum; Ekin : kinetische Energie; EA : Austrittsenergie) Beschreiben Sie kurz das physikalische Phänomen, das als Fotoeffekt bezeichnet wird. Erläutern Sie in diesem Zusammenhang die Bedeutung der beiden Gleichungen (1) und (2). Material 1 zeigt eine Versuchsanordnung zum Fotoeffekt mit der Gegenfeldmethode: Trifft Licht mit einer einheitlichen Wellenlänge λ auf die Fotokathode und bewirkt einen Fotostrom I, so kann die regelbare Spannung U auf einen bestimmten Wert U0 eingestellt werden, ab dem gerade kein Fotostrom mehr fließt. Material 1 enthält eine Wertetabelle, die den Zusammenhang zwischen verschiedenen Wellenlängen λ und dem jeweiligen Betrag der Spannung U0 darstellt. Geben Sie die fehlenden Kehrwerte 1 / λ der Wellenlängen in der Tabelle in Material 1 an. Zeichnen Sie den resultierenden Graphen in das 1 / λ-U0-Koordinatensystem in Material 2. Für positive Spannungswerte lässt sich der Graph aus Aufgabe wie folgt beschreiben: (3) U0(λ)=M cdot frac1λ-N quad M und N sind dabei Konstanten. Bestimmen Sie einen Wert für M und einen Wert für N, jeweils mit Einheiten, anhand von geeigneten Messwerten aus Material 1. Leiten Sie aus den Gleichungen (1) und (2) die Gleichung (3) her und zeigen Sie, dass für die Konstanten M und N gilt: M=frach cdot ce, N=fracEAe(e : Elementarladung, c : Lichtgeschwindigkeit).

Based on the electrical diagram, which component would you select for the symbol labeled NOLS?

A periodic signal with fundamental period T0=2 have complex exponential Fourier Series coefficients D0=1, D1=1, D2=0.5 j and D-2=0.5 j, Find the average power of the periodic signal x(t)

According to previous studies, the mean distance each visitor in Greenspan National Park hikes during their visit is 30 kilometers. The park recently closed its shuttle system, which used to transport hikers to many of the park's most popular hiking trails. Because of this, an administrator at the park suspects the mean distance, μ, is now less than 30 kilometers. The administrator chooses a random sample of 45 visitors. The mean distance hiked for the sample is 27.2 kilometers. Assume the population standard deviation is 9.9 kilometers. Can the administrator conclude that the mean distance hiked by each visitor is now less than 30 kilometers? Perform a hypothesis test, using the 0.10 level of significance. (a) State the null hypothesis H0 and the alternative hypothesis H1.

Luis caught a two-year-old flounder that was 185 millimeters in length. What is the z-score for this length? Round the answers to at least two decimal places. Luis's z-score is.

In fuel economy tests in city driving conditions, a hybrid vehicle's mean was 45.0 mpg with a standard deviation of 2.2 mpg . A comparably sized gasoline vehicle's mean was 34.0 mpg with a standard deviation of 3.2 mpg . Which vehicle's mpg was more consistent in relative terms? (Round your answers to 1 decimal places.)

A ball is launched vertically upward with a velocity of 256 ft / s, so its position function can be modeled as s(t)=-16 t^2+256 t. What is the velocity of the ball when it first reaches a vertical height of 880 ft?

The figure on the right shows the intersections of three one-way streets. Use Gaussian elimination to solve the system of equations that models this situation (shown below). x+10=y+15 z+12=x+9 y+24=z+22 Select the correct choice below and fill in any answer boxes within your choice. A. There is one solution. The solution set is ). (Simplify your answers.) B. There are infinitely many solutions. The solution set is (, ), where z is any real number. (Type expressions using z as the variable.) C. There is no solution.

A ship travels 52 km on a bearing of 20 degrees, and then travels on a bearing of 110 degrees for 113 km. Find the distance from the starting point to the end of the trip, to the nearest kilometer.

Kevin used a kit to put together this model of the solar system. What are two limitations of Kevin's model? A. The real planets move around the Sun, but the model planets cannot. B. The distance between the planets car't be set to scale in the model. C. The model Sun can't give off heat and light as hot and bright as those from the real Sun. D. The model can't have the correct number of planets.

The quantity Fd / t is work. kinetic energy. potential energy. power.

Use the following energy conversion factors to complete the table below: 1 calorie (cal) = 4.184 joules (J) 1 Calorie (Cal) = 1000 calories (cal) 1 kilowatt-hour (kWh) = 3.60 x 10^6 joules (J) J cal Cal kWh ------------ 5.38 x 10^-2 J 1.29 x 10^-2 cal 125 kWh

A pedestrian walks 7.4 kilometers west and then 9.2 kilometers south. What is the magnitude of the pedestrian's resultant vector? Hint: Draw a vector diagram. vecR=[?] kilometers Round your answer to the nearest hundredth.

In Exercises 19 and 20, determine whether the lines through the pairs of points are parallel. 19. A(1,-2), B(-3,-10) and C(1,5), D(-1,1) 20. A(2,3), B(2,-2) and C(-2,4), D(-2,6)

A sports car accelerates from rest to 80 km/h in 5.0 s. What is its average acceleration in m/s^2? Express your answer using two significant figures.

En una planta de procesamiento de metales, se está realizando un estudio sobre la dureza Rockwell de diferentes aleaciones de acero. Los datos recopilados incluyen la dureza Rockwell, la carga aplicada en kilogramos-fuerza (kgf) y la profundidad de penetración en milímetros (mm) para cada aleación. Se desea modelar la relación entre la dureza Rockwell y las demás variables. Utilizando un modelo de regresión lineal para analizar la relación entre la dureza Rockwell y las variables de carga aplicada y profundidad de penetración. ¿Cuál es el valor del estadistico de prueba de Durbin-Watson para este modelo de regresión? Nota: Utilice Excel (herramienta análisis de datos para regresión y residuos) (A) 1,815 (B) 1.655 (C) 2,278 (D) 1.226 (E) 1,410

A 24% efficient engine accelerates a 1,808 kg car from rest to 9.5 m / s. How much energy is transferred to the engine by burning gasoline?

An adult weighs 141 lbs . Convert lbs to kilograms (Round to the nearest tenth p PLEASE INCLUDE THE APPROPRIATE UNITS TO RECEIVE CREDIT!!!

Infinity stones release energy in forms of heat, radiation, and blast work. Assume that an immortal being has collected 2 infinity stones, each capable of producing 5000 tera-Joules (TJ) of energy. If both stones are used simultaneously, how much heat, in SI units of TJ, is supplied from the stones if 30% of the energy produced by the stones is in the form of heat? On Canvas, submit only the magnitude value associated with the proper units; do not include units in your answer online. For instance, for an answer of 10.5 lbf, enter 10.5 into the answer position in Canvas. Do not use scientific notation.

Multiple Choice Question Which describes a second-class lever? The resistance is located between the fulcrum and effort. The effort is located between the fulcrum and resistance. The fulcrum is located between the effort and resistance.

How do the liver and gallbladder function together in the process of digestion?

3.1.6 Quiz: Free Fall Question 1 of 10 A stuntman jumps from the roof of a building to the safety net below. How far has the stuntman fallen after 2.3 seconds? A. 25.9 m B. 9.8 m C. 11.3 m D. 21.2 m SUBMIT PREVIOUS

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