The Cosmic Perspective Fundamentals (2nd Edition)
The Cosmic Perspective Fundamentals (2nd Edition)
2nd Edition
ISBN: 9780133889567
Author: Jeffrey O. Bennett, Megan O. Donahue, Nicholas Schneider, Mark Voit
Publisher: PEARSON
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Chapter 3, Problem 8QQ

Choose the best answer to each of the following. Explain your reasoning.

Galileo’s contributions to astronomy included (a) discovering the laws of planetary motion, (b) discovering the law of gravity. (c) making observations and conducting experiments that dispelled scientific objections to the Sun-centered model.

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Gravitational Potential Energy. Directions: Answer the following problem involving gravitational potential energy. Refer to information given in the box below. The gravitational potential energy of a pair of masses, m, and mz, that are a distance r apart is U, =Cm, m, 2. What is the gravitational potential energy of the moon with respect to the earth? The mass of the moon is 7.35 x 1022 kilograms and the mass of the earth is 5.98 x 1024 kilograms. The earth moon distance is 384, 400 kilometers. Show your solution and answer. Remember that the earth-moon distance is still in kilometers.
B. Show your complete solutions and round off your final answer to 2 decimal places and box your final answers using a red pen. Make sure your solutions are clearly written and properly organized. 1. A ball moves in a straight line (the x-axis). The graph in the figure below shows this ball's velocity as a function of time. v (m/s) 3.0- 2.0 1.0 o J 1.0 2.0 3.0 1 (s) (a) What are the ball's average speed and average velocity during the first 3.0 s? (b) Suppose that the ball moved in such a way that the graph segment after 2.0 s was -3.0 m/s instead of +3.0 m/s. Find the ball's average speed and average velocity in this case. 2. An antelope moving with constant acceleration covers the distance between two points 70.0 m apart in 6.00 s. Its speed as it passes the second point is 15.0 m/s. (a) What is its speed at the first point? (b) What is its acceleration? 3. A juggler throws a bowling pin straight up with an initial speed of 8.20 m/s.How much time elapses until the bowling pin returns…
Briefly explain and show your complete solution. Choose the correct answer from the choices below. Thank you.
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