Which are characteristics of electromagnetic waves? Check all that apply.
They travel only through matter.
Waves with a higher frequency have a shorter wavelength.
o Waves with a higher frequency have a longer wavelength.
They all move at the same speed.
They can travel through space.

explanation:

newton's third law, for every action there is an equal and opposite reaction.

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.