3. The degree of totmess in internal energy that the equals the difference between heat taken in and the work done by the system. Its law 1. of a substance molecular kinetic energy, molecular pote other kinds of molecular energy. The internal energy of the hot substance internal energy of the cold substance when work is done is negligible. is used when energy is in tran The Si unit for energy is
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The SI unit of Energy is “Joules” (J). This is also the SI unit of work. Basically energy is the ability to do work; it is the power derived from the utilization of physical or chemical resources, especially to provide light and heat or to work machines.
According to Einstein's famous equation: E = m(c^2) the energy E of a physical system is numerically equal to the product of its mass m and the speed of light c squared.
There are other vast formula for deriving energy; as energy exists in many forms such as: mechanical, electric, magnetic, gravitational,chemical, gravitational, chemical, ionisation, nuclear, thermal, sound wave, chromodyn, elastic, radiant… and lots more.
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