Can a rocket operate in free space ?

A rocket can move in air free space, but a jet plane cannot. Why?

Does the centre of mass of a rocket in free space accelerate? Explain. Can the speed of a rocket exceed the exhaust speed of the fuel? Explain.

The electromagnetic waves travel in free space with the velocity of

The value of electrostatic force constant in free space is ……… .

Electric flux through a closed surface in free space enclosing a charge q is

A satellite is revolving in an elliptical orbit in free space, then the false statement is

A 2000 kg rocket in free space expels 0.5 kg of gas per second at exhaust velocity "400 m s"^(-1) for 5 s. The increase in the speed of the rocket in this time is

If rocket engine ejects fuel at the rate mu kg/s with relative velocity v_(r) . At time t = 0, speed of rocket is u. Consider the value of acceleration due to gravity is constant and equal to g. If rocket is in gravity free space then find velocity of rocket as function of time.