Monday, July 18, 2011
A spaceship whizzes by earth at speed v=0.70c. An astronaut calls his wife to wish her a happy birthday by rad?
A spaceship whizzes by earth at speed v=0.70c. An astronaut calls his wife to wish her a happy birthday by radio transmission that lasts 45.0 s as measured aboard the spaceship. How much time elapses on her clock on earth during this radio transmission?
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