Chapter 36: Q. 34 (page 1060)
At what speed, as a fraction of c, is a particle’s momentum twice its Newtonian value?
Short Answer
Speed of particle will be 0.866c.
Chapter 36: Q. 34 (page 1060)
At what speed, as a fraction of c, is a particle’s momentum twice its Newtonian value?
Speed of particle will be 0.866c.
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Get started for freeA modest supernova (the explosion of a massive star at the end of its life cycle) releases of energy in a few seconds. This is enough to outshine the entire galaxy in which it occurs. Suppose a star with the mass of our sun collides with an antimatter star of equal mass, causing complete annihilation. What is the ratio of the energy released in this star-antistar collision to the energy released in the supernova?
Your friend flies from Los Angeles to New York. She carries an accurate stopwatch with her to measure the flight time. You and your assistants on the ground also measure the flight time.
a. Identify the two events associated with this measurement.
b. Who, if anyone, measures the proper time?
c. Who, if anyone, measures the shorter flight time?
At what speed, in would a moving clock lose role="math" localid="1649531760117" in day according to experimenters on the ground?
Hint: Use the binomial approximation.
As the meter stick in FIGURE Q36.8 flies past you, you simultaneously measure the positions of both ends and determine that
a. To an experimenter in frame S′, the meter stick’s frame, did you make your two measurements simultaneously? If not, which end did you measure first? Explain.
b. Can experimenters in frame S′ give an explanation for why your measurement is less than 1 m.
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’s speed relative to the ground if he throws the paper (a) forward, (b) backward, and (c) to the side?
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