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Chapter 36: Q. 33 (page 1060)
A particle has momentum . What is the particle鈥檚 speed in m/s?
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A distant quasar is found to be moving away from the earth at . A galaxy closer to the earth and along the same line of sight is moving away from us at . What is the recessional speed of the quasar, as a fraction of , as measured by astronomers in the other galaxy?
You fly across the United States on an airliner at You return two days later at the same speed.
a. Have you aged more or less than your friends at home?
b. By how much?
Hint: Use the binomial approximation
A newspaper delivery boy is riding his bicycle down the street at . He can throw a paper at a speed of . What
is the paper鈥檚 speed relative to the ground if he throws the paper (a) forward, (b) backward, and (c) to the side?
FIGURE Q36.1 shows two balls. What are the speed and direction of each (a) in a reference frame that moves with ball 1 and (b) in a reference frame that moves with ball 2?
An astronaut travels to a star system away at a speed of Assume that the time needed to accelerate and decelerate is negligible.
a. How long does the journey take according to Mission Control on earth?
b. How long does the journey take according to the astronaut?
c. How much time elapses between the launch and the arrival of the first radio message from the astronaut saying that she has arrived?
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