Internal Incompressible Fluid Flow

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The first law of thermodynamic is a statement of conservation of energy. The energy different of the heat added to the system and work result from the same system is same as the value of energy change.

In the other words can we say the energy can not be created or destroyer, that's only can be transferred from one to another.

From the control volume of the first low of thermodynamic can be found the Bernoulli equation. The large of Bernoulli equation can we see as below...

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