15 points!

What is thermal energy?

A. It is the total potential energy of the system

B. It is the total of the potential and kinetic energy in a system

C. It is the difference between the total kinetic and potential energy in a system.

D. It is the total kinetic energy of the system.

Iknow the answer is a but i don't know why

An object displaces 652 ml of water. the volume of the object is: 0.652 cm³ 6.52 cm³ 65.2 cm³ 652 cm³

Liquid from a brewery fermentation contains 10% ethanol and 90% water. part of the fermentation product (50,000 kg/h) is pumped to a distillation column on the factory site. under current operating conditions, a distillate of 45% ethanol and 55% water is produced from the top of the column at a rate of one-tenth that of the feed. what is the composition of the waste "bottoms" from the still?