B.Electromagnetic
explanation:
Answer:
transmit energy
Explanation:
Waves (both mechanical and electromagnetic) are periodic perturbations of the space that transmit energy without transmitting matter. (so, "transmit energy" is valid for both types of waves).
The other statements are wrong because:
have compressions and rarefactions --> this is a property only of longitudinal waves, while electromagnetic waves are transverse, so they do not have compressions
oscillate in the same direction as the wave motion --> this is the description of longitudinal waves, while electromagnetic waves are transverse,
require a medium for transfer --> this is true only for mechanical waves: electromagnetic waves in fact do not need a medium to propagate.
C is the answer because contact force, is the only force mentioned that opposes the motion of the rock
The color can be determined by either the frequency or the amplitude. The amplitude is the maximum height of the wave, while frequency is the number of cycle (amplitude to amplitude) per second. <em>Thus, the answer would be: the amplitude of the wave.</em>