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First law of Thermodynamics

The first law of Thermodynamics usually applies to situations where?
A : Thermal Energy is converted to Mechanical Energy
B : Chemical Energy is converted to electrical energy
C : Light energy is converted to sound Energy
D : Nuclear energy is converted to sound energy

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keijosalonen

Answer:

Thermal energy is taken from heat sink in higher temperature. A thermal power machine does mechanical energy using part of the heat.

Part of heat taken are given in cold reservoir in lower temperature

Explanation:

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