A ruler has rest length of L0, moves by light speed approximately, its kinetic energy equals...
A ruler has rest length of L0, moves by light speed approximately, its kinetic energy equals 4 times the rest kientic energy. Find the new length of the ruler?
A) ½L0
B) ¾L0
C) L0
D) ¼L0
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A ruler has rest length of L0, moves by light speed
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