As the train rushed down the hill, gravitational potential energy was converted into kinetic energy.
Which piece of evidence best supports the claim?
A. The speed of the train increased as the height of the
train decreased
B. The people in the train felt like they were being
pushed down at the bottom of the hill,
C. The train kept moving when it reached the flat part of
the track

A. The speed of the train increased as the height of the

train decreased

Explanation:

the water is warmed up by the sun and then it evaporates into the atmosphere. the sunlight warms the water by its heat. water is then cooled down and condensation takes place. the water then finally returns back to the earth by the process of precipitation in the form of rain or ice.

explanation:

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.