Question

Total energy of the earth $+$ sun system is negative. How do you interrupt the negative energy of a system?

Answer 1

Hint- The principle, ‘State of low energy is stable’ is one of the fundamental principles of physics.

Total energy of the earth plus the sun system is negative. It means that earth plus sun form a closed system which is stable

A system is said to be closed when there is no exchange of matter but there can be exchange of energy. Earth and sun together form such a system in which only exchange of energy takes place.

Step by step solution:
The principle, ‘State of low energy is stable’ is one of the fundamental principles of physics. If a system has negative energy it means the system is stable. It is given that the total energy of the earth plus the sun system is negative. It means that earth plus sun form a closed system which is stable.

A system is said to be closed when there is no exchange of matter but there can be exchange of energy. Earth and sun together form such a system in which only exchange of energy takes place. By saying that it is a closed system it also means that the Earth is always bound to the sun or earth is constantly under the attractive force of the sun. It is due to this attractive force that the Earth revolves around the sun. It cannot escape from this attractive force.

Earth and sun together form a closed system where mass neither goes out of the system nor enters the system.

Note: Don’t get confused with isolated systems and closed systems. An isolated system is a system which has no interaction with the outside universe, neither energy nor matter escape from the system or enter the system. Whereas, a system is said to be closed when there is no exchange of matter but there can be exchange of energy. Earth and sun together form such a system in which only exchange of energy takes place.