. A cross-country skier moves from location A to location B to location C to location D. Each leg of the backand-forth motion takes 1 minute to complete; the total time is 3 minutes. (The unit is meters.)

no

sodium is solid at rt

the motion of a pendulum is a classic example of mechanical energy conservation. a pendulum consists of a mass (known as a bob ) attached by a string to a pivot point. as the pendulum moves it sweeps out a circular arc, moving back and forth in a periodic fashion.

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge