If it is mechanical energy, that is called "work". For thermal energy, the word "heat" is used. For energy in general, I don't think there is a special name for it.
usable energy changes, while total energy does not
The total amount of energy remains constant when it changes from one form to another, according to the law of conservation of energy. Energy can neither be created nor destroyed; it simply changes from one form to another.
The total amount of energy remains constant, but it is transformed from chemical energy in the match head to thermal energy (heat) and electromagnetic energy (light) when the match is lit. This is an example of energy conservation in a closed system.
When energy changes forms, it is not always produced. In fact, energy is conserved in a system, meaning it can neither be created nor destroyed. So, when it changes forms, the total amount of energy remains constant.
In physical changes, the total amount of energy before and after remains the same as no new substances are formed. In chemical changes, there may be a difference in the total amount of energy before and after the reaction due to the formation of new substances and the breaking or forming of chemical bonds.
No, it should remain constant.
No. It just gets moved around. The total amount of energy stays the same.
Yes, that's correct. In a closed system, the total amount of energy remains constant. This principle is known as the law of conservation of energy.
You are thinking of the conservation of energy law which states energy can neither ber created or destroyed.
It stays the same.
The total amount of energy doesn't change. However, some useful energy will be converted into unusable energy.The total amount of energy doesn't change. However, some useful energy will be converted into unusable energy.The total amount of energy doesn't change. However, some useful energy will be converted into unusable energy.The total amount of energy doesn't change. However, some useful energy will be converted into unusable energy.
It remains constant