What are benefits of physical education and how does it play a part in our everyday lives ?

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?

How to calculate voltage drop in a series circuit

The first law of thermodynamics states that heat added to a system is neither created nor destroyed but is as it changes into other forms of energy.