A 101-meter long relativistic train approaches a 100-m long platform at high speed.How fast must the train be going to fit entirely inside the length of the platform?
A) 3.0 * 108 m/s
B) 4.2 * 107 m/s
C) 9.5 * 106 m/s
D) 4.7 * 106 m/s
E) 6.2 * 105 m/s
Correct Answer:
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