A spacecraft approaching the earth at 0.6c transmit data at the rate of 40 pulses/s. At what rate are they received? O A. 10 pulses/s B. 40 pulses/s O C. 80 pulses/s O D. 100 pulses/s O E. 120 pulses/s
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A spacecraft receding from the earth at 0.6c transmit data at the rate of 80 pulses/s. At what rate are they received?
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