1 point In the diagram, the pulley systems that offer mechanical advantage of 3
are: (check all that apply)
TTATI
B

С
D
LE

Atrain departs from its station at a constant acceleration of 5 m/s. what is the speed of the train at the end of 20s?

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.

Explain why electric current cannot exist if a current doesn't have a voltage source.