NEET-XII-Physics
25: Calorimetry
- #7The mechanical equivalent of heat
(a) has the same dimension as heat
(b) has the same dimension as work
(c) has the same dimension as energy
(d) is dimensionlessdigAnsr: dAns : (d) is dimensionless
If the mechanical work done (W) produces the same temperature change as heat (H), then the mechanical equivalent of heat (J) is equal to W/H. Thus,
J = W/H
Since the unit of work and heat is the same, mechanical equivalent of heat is dimensionless.
Page No 46: