12.

a space walker conducts a sound experiment on a space walk by striking a tuning fork with a mallet. instrumentation is used to detect sound waves. which explains the results of this experiment?

a.
sound waves are mechanical waves and don't require a medium. sound does travel in the vacuum of space, so a sound would be produced and detected.

b.
sound waves are electromagnetic waves and don't require a medium. sound does travel in the vacuum of space, so a sound would be produced and detected.

c.
sound waves are mechanical waves and must travel through a medium. sound does not travel in the vacuum of space, so no sound would be produced or detected.

d.
sound waves are electromagnetic waves and must travel through a medium. sound does not travel in the vacuum of space, so no sound would be produced or detected.