John throws two identical balls up into the air. for the balls to have the same amount of gravitational potential energy at a certain point on time, what must be true?

Astudent looks at ocean waves coming into the beach. an ocean wave with more energy will a) have a greater height. b) have a greater period. c) travel toward the beach faster. d) strike the beach with greater frequency.

How to tell if a molecule is polar or nonpolar with electronegativity

Acoil suspended freely, points in some direction when no current is passed through it . can you tell what will happen when a current is passed though it?