A radar signal is beamed towards a planet from the earth and its echo is received seven minutes later. Calculate the velocity of the signal, if the distance between the planet and the earth is 6.

A rada signal is sent towards a planet and its echo is received after 600 seconds. Find the distance of the planet from the earth.

A radar signal is beamed towards a planet and its echo is recived 7 minutes later. If the distance between the planet and earth is 6.3xx10^(10)m, calculate the speed of the signal.

A sonar device on a submarine sends out a signal and receives an echo 5 s later. Calculate the speed of sound in water if the distance of the object from the submarine is 3625 m ,

Mass and radius of a planet are two times the value of earth. What is the value of escape velocity from the surface of this planet?

The escape velocity of a planet having mass 6 times and radius 2 times as those of the earth is

If acceleration due to gravity on the surface of a planet is two times that on surface of earth and its radius is double that of earth. Then escape velocity from the surface of that planet in comparison to earth will be