If the train took about 5.4 second to go from the top of the first hill to the bottom of the first hill, what was the speed of the train at the bottom of the first hill

The speed of the train down the hill will double because of increased accelaeration.

Explanation:

Therefore, if it takes the train 5.4 seconds to climb the top of the hill, it will take it 5.4 x 2 = 10.8 seconds on the bottom of the hill.

show the wavelengths of a wave. show the crests of a wave.

the force represented by vector a is normal force. if the hockey puck is moving to the right, when it is hit with a significant force by the hockey stick the puck will move off in a different direction. correct on edge.