At what speed would a clock have to be moving in order to run at a rate that is one-third the rate of a clock at rest?
a. 0.97c
c. 0.87c
b. 0.75c
d. 0.94c
Question 2
A boxcar without a front or a back is moving toward the right. Two electrons move through the boxcar, one moving from back to front toward the right, the other moving from front to back toward the left. According to me, each electron is moving with a speed of 0.8c, and the boxcar is moving with a speed of 0.6c. A passenger in the boxcar records how long it takes each electron to pass from one end of the boxcar to the other end. According to the passenger, which took less time?
a. the electron going from front to back
b. the electron going from back to front
c. Since nothing can go faster than light, an electron cannot move toward the left with a speed of 0.8c through a boxcar moving toward the right with a speed of 0.6c. d. They both took the same time.
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