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  1. A block is moving up an inclined plane of inclination 60° with velocity of 20 ms⁻¹
  2. Two vessels separately contain two ideal gases A and B at the same temperature,
  3. The molar specific heat at constant pressure of an ideal gas is (7/2)R. The ratio
  4. Electromagnets are made of soft iron because soft iron has
  5. A black body is heated from 27° C to 127° C. The ratio of their energies of radiations