Question

part a
i bet you have watched astronauts in the space station on television or on your computer. we see them; we hear them speak. how are the voices of astronauts transmitted back to earth?
a sound waves
b transverse waves
c mechanical waves
d longitudinal waves

Explanation:

Sound waves, mechanical waves, and longitudinal waves all require a medium to travel. Space is a vacuum, so these cannot be used for transmission. Transverse waves, which include electromagnetic waves, can travel through a vacuum. Radio waves (an electromagnetic - transverse wave) are used to transmit astronauts' voices back to Earth.

Answer:

B. transverse waves