Tony stands on a train with rest length 30 meters moving at 4/5c with respect to Joe and synchronizes two clocks at the front and back of the train. In Joe's frame, which of the following statements is true of the readings on the clocks?
W) The rear clock is 5 microseconds ahead of the front clock
X) The rear clock is 5 microseconds behind the front clock
Y) The rear clock is 5 nanoseconds ahead of the front clock
Z) The rear clock is 5 nanoseconds behind the front clock
✔️Answer:W) The rear clock is 5 microseconds ahead of the front clock
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