Which equation describes the sum of the two vectors plotted below?

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.

Where do magnetic lines of force enter earth?

Ryan is examining the energy of the particles in a bar of gold. what is ryan most likely studying?