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Chapter 36: Q. 66 (page 1062)
At what speed, as a fraction of c, is the kinetic energy of a particle twice its Newtonian value?
The speed will be
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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?
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?
A cosmic ray travels through the earth鈥檚 atmosphere in as measured by experimenters on the ground. How long does the journey take according to the cosmic ray?
A laboratory experiment shoots an electron to the left at . What is the electron鈥檚 speed, as a fraction of c, relative to a proton moving to the right at ?
At what speed, as a fraction of c, must an electron move so that its total energy is 10% more than its rest mass energy?
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