explain why the skater must be at a specific height at the start to successfully reach the end of the ramp.
be sure to use the terms "potential energy" and "kinetic energy" in your answer.

Arollercoaster car at the top of a hill has potential energy kinetic energy chemical energy light energy

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.

Determine the reaction and balance the following equations urgent due in the morning