Question

An astronaut whose pulse frequency remains constant at 72 beats/min is sent on a voyage. What would her pulse beat be, relative to Earth, when the ship is moving relative to Earth at (a) 0.10c and (b) 0.90c? (a) 31 beats/min (b) 31 beats/min (a) 72 beats/min (b) 72 beats/min (a) 72 beats/min (b) 31 beats/min (a) 31 beats/min (b) 72 beats/min

Answer 1

Formula : time dilation :- to t proper time to = = V 2 1. Here proper time is time on space ship and "t" earth. time observed is time for person on @ Speed v = 0.10 c So, I min on spaceship is to t = - min on earth 11- (0.4%) t = 1.00504 min on earth 1. So, beats 1 min relative to earth = 72 beats / min toosou beats I min relative to earth ~ 72 beats 1 min

© speed ve 0.900 So, 1. 1 min on spaceship = min on earth Je-10.902 = 2.29uI min on earth. relative So, to = beats I min earth beats/ min 72 2-2901 beats I min relative to earth = 31.38 beats/ min u 31 beats / min (a) = 72 beats/ min (b) = 31 beats Imin,