What happens when objects of different mass are dropped under the same gravitational conditions

Phase changes are chemical changes. true or false

Apebble is thrown into a calm lake, ripples are formed from the center and move outward. the water particles in the lake travel in a circular pattern that moves up and down on the surface of a lake, and the energy travels a) diagonally. b) downward. c) horizontally. d) upward.

Why does lightning travel from clouds to the ground?