Answer:
System
Explanation:
A system is an object or group of objects that we wish to consider for a physics problem. Examples of systems are universe, house and its surroundings etc.
There are three different types of systems which are:
- Isolated system: In this type of system there is no energy or matter exchange with the surroundings.
- Closed system: In this type of system, only energy is exchanged with the surroundings, matter is not exchanged.
- Open system: in this system both matter and energy are exchanged with the surroundings..
