The mechanical equivalent
of heat ‘J’ is equal to
ऊष्मा का यांत्रिक तुल्यांक 'J' के बराबर है
4.1868 kg/kcal
41.8 kg/kcal
4.1868 kcal/kg
4.1868 kj/kcal
4.1868 kj/kcal
Mechanical equivalent of heat is a dimension less quantity. It is ratio of amount of work done and heat energy.
Note: James
Prescott joule established that heat energy is the equivalent of mechanical
energy i.e. 1 cal = 4.186 J or 4.189
J/cal or 4.186 kJ/kcal.
Hence,
the correct option is (D).
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