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 xx 10^(10) m. Calculate the speed of the signal.

A RADAR signal is beamed towards a planet and its echo is received 7 m

1.	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 xx 10^(10) m. Calculate the speed of the signal.
Answer» Solution :The distance of the planet from the Earth `d = 6.3 xx 10^(10)` m Timet = 7 MINUTES = `7 xx 60` s The speed of signalv = ? The speed of SIGNAL `v = (2d)/(t) = (2xx63xx10^(10))/(7xx60) = 3XX10^(8) ms^(-1)`