Question

a radar signal is beamed towards a planet and its echo is received 10 minutes later. If the distance between the planet and the earth is 6.3 × 10^10 m. Calculate the speed of the signal?​

Answer 1

Answer:

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Answer 2

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velocity = displacement/time

displacement = 0

thus velocity = 0.

speed = distance travelled/time

speed = (2×6.3×10^10)/(7×60) = 3×10^8 m/s (speed of light)