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Chapter 36: Q. 32 (page 1060)
A proton is accelerated to .
a. What is the proton鈥檚 momentum?
b. By what factor does the proton鈥檚 momentum exceed its Newtonian momentum?
a.)
b.) localid="1649819657839" times less
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FIGURE Q36.5 shows Peggy standing at the center of her railroad car as it passes Ryan on the ground. Firecrackers attached to the ends of the car explode. A short time later, the flashes from the two explosions arrive at Peggy at the same time.
a. Were the explosions simultaneous in Peggy鈥檚 reference frame? If not, which exploded first? Explain.
b. Were the explosions simultaneous in Ryan鈥檚 reference frame?
Two rockets, and , approach the earth from opposite directions at speed of . The length of each rocket measured in its rest frame is . What is the length of rocket as measured by the crew of rocket ?
At what speed, as a fraction of would a round-trip astronaut 鈥渓ose鈥� of the elapsed time shown on her watch?
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 cube has a density of while at rest in the laboratory. What is the cube鈥檚 density as measured by an experimenter in the laboratory as the cube moves through the laboratory at of the speed of light in a direction perpendicular to one of its faces?
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