Is it true that a conductor is a material that doesn't allow electrons to flow through it easily?

Which of the following are properties of mechanical waves? check all that apply ⭕️ particles of the medium move back and fourth, but do not move with the wave. ⭕️ the particles of the medium always move parallel to the wave motion. ⭕️ wave motion begins with a disturbance in the medium. ⭕️ waves transport energy from a source outward, away from the source.

What happens when a rubber rod is rubbed with a piece of fur?

If two parallel light rays hit a mirror, they will not be parallel to each other after they reflect.