Question

Which of these are not mechanical waves and can be used to send a signal to astronauts on the moon?

A) sound waves
B) radio waves
C) both sound waves and radio waves
D) neither sound waves or radio waves

Answer 1

Well sound waves can't go in space because they have no where to bounce off so I think you can find out what it is.

Answer 2

The answer is B

Step-by-step explanation:

Radio wave is a type of electro magnetic radiation and are mainly used for communiciatons. It ranges from the length of a football field to larger than our planet that is why it is used in communicating with astronauts.