An astronaut at rest on earth has a heartbeat rate

Reference no: EM13659550

An astronaut at rest on Earth has a heartbeat rate of 70 beats/min. When the astronaut is traveling in a spaceship at 0.87c, what will this rate be as measured by the following.

1) An observer also in the ship

2) An observer at rest on Earth

Reference no: EM13659550

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