The Cosmic Perspective (9th Edition)
The Cosmic Perspective (9th Edition)
9th Edition
ISBN: 9780134874364
Author: Jeffrey O. Bennett, Megan O. Donahue, Nicholas Schneider, Mark Voit
Publisher: PEARSON
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Chapter S2, Problem 6EAP

Suppose you see a friend moving by you at some constant speed. Explain why your friend can equally well say that she is stationary and you are moving by her.

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A railroad flatcar is traveling to the right at a speed of 13.0 m/sm/s relative to an observer standing on the ground. Someone is riding a motor scooter on the flatcar 1.What is the magnitude of the velocity of the motor scooter relative to the flatcar if its velocity relative to the observer on the ground is 18.0 m/sm/s to the right?Express your answer in meters per second. 2.What is the direction of the velocity of the motor scooter relative to the flatcar in this case? 3. What is the magnitude of the velocity of the motor scooter relative to the flatcar if its velocity relative to the observer on the ground is 3.0 m/sm/s to the left? Express your answer in meters per second.   4.  What is the direction of the velocity of the motor scooter relative to the flatcar in this case?   5.  What is the magnitude of the velocity of the motor scooter relative to the flatcar if its velocity relative to the observer on the ground is zero? Express your answer in meters per second.…
Your friend and you fly in identically constructed spacecrafts. She overtakes you at a constant speed. She tells you that her craft is 24 m-long and your craft is 12 m long. a)  How fast is your friend traveling relative to you? b)  How long does it take your friend’s craft to pass you? c)  What is the speed of the light coming from the headlights of your fiend’s craft as measured by you? Show the calculation or give the reason for your answer.
According to Einstein's Special Theory of Relativity, an object moving at close to the speed of light will appear to  Select one: a. get longer in the direction of its motion b. maintain a constant length, independent of its motion c. get shorter in the direction of its motion

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The Cosmic Perspective (9th Edition)

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Time Dilation - Einstein's Theory Of Relativity Explained!; Author: Science ABC;https://www.youtube.com/watch?v=yuD34tEpRFw;License: Standard YouTube License, CC-BY