Please list them from top to bottom, for exp like in your response, a, g,q, d. Giving quite some points for it.

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.

When an object is heated it contracts. a. true b. false

Name the non metal condut electricity