Heat given to a body, which raises its temperature by 1^oC is :

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 )

The earth radiates in the infra-red region of the spectrum. The spectrum is correctly given by

A spherical body of area A and emissivity e = 0.6 is kept inside a perfectly black body. Energy radiated per second by the body at temperature T is:

A metal ball immersed in alcohol weighs W₁ at 0^oC and W₂ at 50^oC. The co-efficient of cubical expansion of the metal is less than that of the alcohol. Assuming that the density of the metal is large compared to that of alcohol, it can be shown that :

The earth receives at its surface radiation from the sun at the rate of  1,400 Wm^-2. The distance of the centre of the sun from the surface of the earthy is 1.5 x 10¹¹ m and the radius of the sun is 70 x 10⁸ m. Treating sun as a black body, it follows from the above data that its surface temperature is:

A block of steel heated to 100^oC is left in a room to cool. Which of the curves shown in the figure, represents the correct behaviour ?

       

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 

If boiling point of water is 95^oF, what will be reading at Celsius scale ?

According to Newton's law of cooling, the rate of cooling of a body is proportional to , where  is the difference of the temperature of the body and the surroundings and n is equal to