Find what will this rate be when she is traveling

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Reference no: EM13675639

An astronaut at rest on Earth has a heartbeat rate of 70 beats/minute. Find what will this rate be when she is traveling in a spaceship at 0.90c as measured

(a) by an observer also in the ship and

(b) by an observer at rest on the Earth?

Reference no: EM13675639

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