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Sahay Sir > Question Answers > Arihant Physics by D.C Pandey > Volume 1 > Chapter 15 - Thermodynamics > A black metal foil is warmed by radiation from a small sphere at temperature ′ T ′ and at a distance ′ d ′ . It is found that the power received by the foil is P. If both the temperature and distance are doubled, the power received by the foil will be :

A black metal foil is warmed by radiation from a small sphere at temperature ′ T ′ and at a distance ′ d ′ . It is found that the power received by the foil is P. If both the temperature and distance are doubled, the power received by the foil will be :

The following sets of values for Cv and Cp ​of an ideal gas have been reported by different students. The units are cal.mole^−1 K^−1. Which of these sets is most reliable?