Conservation of energy
Bhautik vigyan (Physics), me conservation of energy ke matlab ii hae ki ek system me puura jorr ke sakti kabhi nai badle hae, lekin kon rakam ke energy ii hae badal jaae sake hae jaise ki friction, kinetic energy me badal ke thermal energy de hae.
Duusra websites
badloMISN-0-158 The First Law of Thermodynamics (PDF file) by Jerzy Borysowicz for Project PHYSNET.
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