One astronut speaks with another astronaut on Moon. Can the other astronaut listen to the first astronaut?

Astronauts in deep space use radio devices to communicate with each other. The radio device converts the sound produced by the first astronaut into radio signals that reach to the radio device of the second astronaut. There, this radio signal converts back into sound so that the second astronaut can hear the voice of the first. In outer space, astronauts use radio devices instead of direct sound to communicate because

Two astronauts A and B connected with a rope stay stationary in free space relative to their spaceship. Mass of A is more than that of B and the rope is straight. Astronaut A statas pulling the rope but astronaut B does not. If you were the third astronaut in the spaceship, what do you observe?

Describe the way the mass of an astronaut and the gravitational force on the astronaut very during a trip from the earth to the moon.