A 25 kg rock is perched 20m above a road. How much potential energy
does it have?

Aphysical change is a change in the size, shape,, or stafe of matter true or false

Awave that is traveling fast can be said to have a high a. frequency b. speed c. wavelength d. amplitude e. period f. none of these

Acircular ring of charge with radius b has total charge q uniformly distributed around it. what is the magnitude of the electric field at the center of the ring? 0 keq/b2 keq2/b2 keq2/b none of these answers