Question

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?​

Answer 1

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)