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A spaceship approaches Earth with a speed 0.38c. A passenger in the spaceship measures his heartbeat as 72 beats per minute. How many beats per minute are observed in the telemetry radio signals received on Earth? Note that, in addition to time dilation, one must take into account that the signals of successive heartbeats have to travel shorter distances because the spaceship is moving closer (Doppler Effect).
A) 75
B) 107
C) 48
D) 100
E) 67
Two waves travel simultaneously through the same medium. The first wave is described by y1(x,t) = (2.00 cm)cos[kx-t], What is the amplitude of the resulting wave
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The image behind a convex mirror (radius of curvature = 92 cm) is located 8 cm behind the mirror. Where is the object located
q1. a ball is thrown directly up from the ground with speed vsub0. at the same time a second ball is dropped from rest
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