What's the symbol for an ionized gallium atom?

If a refrigerator is a heat pump that follows the first law of thermodynamics, how much heat was removed from food inside of the refrigerator if it released 380j of energy to the room?

The cerebellum controls? thirst sensations sleep-wake cycles hand-eye coordination heart rate and pulse

Why is the energy that results from a roller coaster's position at the top of a hill referred to as potential energy?