A black body radiates heat energy at the rate of 2 × 10⁵ J/s/m² at a temperature of 127°C. The temperature of black body at which the rate of radiation is 32 × 10⁵ J/s/m² is

Which of the following has the highest specific heat ?

Heat capacity of a body is infinite.  It means

An ungraduated thermometer of uniform bore is attached to a centimetre scale and is found to read 10.3 cm in melting ice, 26.8 cm in boiling water and 6.5 cm. in freezing mixture.  The temperature of the freezing mixture will be :

The volume of a liquid is 830 m³ at 30^o C and it is 850 m³ at 90^o C.  The coefficient of volume expansion of the liquid is 

Wien's law states that :

A person weighing 60 kg taken in 2000 kcal diet in a day.  If this energy were to be used in heating the person without any losses, what would be his rise in temperature ? (sp. heat of human body is 0.83 cal/gm/^o C )

A black body has maximum wavelength λ_m at 2000 K. Its corresponding wavelength at 3000 K will be

A copper block of mass 2.5 kg is heated in a furnace to a temperature of 500^o C and then placed on a large ice block.  The maximum amount of ice that can melt is :
(sp.heat of Cu = 0.39 J/gm/^o C and heat of diffusion of water = 335 J/gm)

During constant temperature, we feel colder on the day when the relative humidity is