4. If the skateboarder continues going back and forth on the half-pipe, she'll eventually come to a stop at the bottom automatically. Explain why, in terms of her energy.

The discovery of the electron as a subatomic particle was a result of

Frank just graduated from eighth grade. assuming exactly four years from now he will graduate from high school how many seconds does he have until his high school graduation

The strong nuclear force acts over a small distance than the electrostatic force. true or false