I need to find the chemical equation

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

What overall charge must all compounds have

Match term definition ellipse a) diagonal cross section of a cylinder circle b) diagonal cross section through the widest part of a sphere sphere c) cross section parallel to the base of a cone great circle d) shape created when a semi-circle is rotated around the y-axis triangle e) perpendicular cross section of a cone