8,000,000 kg of water are at the verge of dropping over niagara falls to the rocks 50.0 meters below. what is the change in gravitational potential energy as the water splashes on the rocks below?

Which of the following is the phase that results when the moon is on the opposite side of the earth from the sun? a. quarter moon b. crescent moon c. new moon d. full moon

What causes the development of most clouds and precipitation in the atmosphere?

This is a form of winter precipitation. it is frozen precipitation falling as ice pellets. snowflakes melt into raindrops as they pass through a thin layer of warmer air. the raindrops then refreeze into particles of ice when they fall into a layer of sub-freezing air near the surface of the earth. this precipitation is called a) hail. b) rain. c) sleet. d) snow.