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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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The star Alpha goes supernova. Ten years later and 100 ly away, as measured by astronomers in the galaxy, star Beta explodes.
a. Is it possible that the explosion of Alpha is in any way responsible for the explosion of Beta? Explain.
b. An alien spacecraft passing through the galaxy finds that the distance between the two explosions is 120 ly. According to the aliens, what is the time between the explosions?
Firecrackers A and B are apart. You are standing exactly halfway between them. Your lab partner is on the other side of firecracker A. You see two flashes of light, from the two explosions, at exactly the same instant of time. Define event 1 to be 鈥渇irecracker A explodes鈥� and event 2 to be 鈥渇irecracker B explodes.鈥� According to your lab partner, based on measurements he or she makes, does event 1 occur before, after, or at the same time as event 2? Explain
At what speed, as a fraction of c, is a particle鈥檚 momentum twice its Newtonian value?
Firecracker A is from you. Firecracker B is from you in the same direction. You see both explode at the same time. Define event 1 to be 鈥渇irecracker A explodes鈥� and event 2 to be 鈥渇irecracker B explodes.鈥� Does event 1 occur before, after, or at the same time as event 2? Explain.
A quarter-pound hamburger with all the fixings has a mass of . The food energy of the hamburger (food calories) is .
a. What is the energy equivalent of the mass of the hamburger?
b. By what factor does the energy equivalent exceed the food energy?
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