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Originally Posted by mkirkpatrick How many forms of energy are there! |
In physics, there are just two basic forms of energy. The kinetic and potential energy. Although they are relatively connected to each other for every specific system, their sum within an isolated thermodynamic system is a constant if and only if the system in particular is also conservative and time independent. So, along this line, if we consider the entire universe as a conservative, time independent isolated system then the universal total energy (sum of total kinetic and total potential) is a constant.