A RADAR signal is beamed towards a
planet and its echo is received 7 minutes
later. If the distance between the planet
and the Earth is 6.3 x 1010 m. Calculate the
speed of the signal?
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Answer:
Explanation:
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)
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