Can an astronaut listen to the sound produced by another astronaut on the surface of moon?

Consider the following statements with reference to observations made by an astronaut on the· surface of moon: 1. The astronaut finds that a simple pendulum continues to oscillate for a much longer time, than that on the earth. 2. No atmosphere exists there. Which of the statements given above is/are correct?

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

(a) An electric bell is suspended by thin wires in a glass vessel and set ringing. Describe and explain what happens if the air is gradually pumped out of the glass vessel. (b) Why cannot a sound be heard on the moon? How do astronauts talk to one another on the surface of moon?

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

Can two astronauts talk on the surface of moon as they do on earth?Why?

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?

Will the sound be audible if the string is set into vibrations on the surface of the moon?