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Question

The pair of quantities that do not have the same dimensions is

A
Latent heat, specific heat
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B
Gravitational force, Coulomb force
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C
Kinetic energy of a freely falling body, potential energy of compressed spring
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D
Coefficient of friction, number of molecules in a container.
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Solution

The correct option is C Latent heat, specific heat
  • Specific heat: = energy required to change a unit mass of a material by 1°C. Units: energy per unit mass per degree.
  • Latent heat = energy required to change the state (gas, liquid, solid) of a unit mass of material. Units: energy per unit mass.

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