Which point on the roller coaster's path represents the point where potential energy is at a maximum? *
Point A
Point B
Point C
Point D

Point A

Explanation: Gravitational potential energy is the energy that an object has because of its height and is equal to the object’s mass multiplied by it’s height multiplied by the gravitational constant (PE = mgh). Gravitational potential energy is greatest at the highest point of a roller coaster and least at the lowest point.

kepler used the data from tycho blahe (his mentor) to construct the laws of planetary motion.

the doppler effect is used by weather forecasters to measure 

moving clouds