Heat capacity of a body is infinite. It means
heat is given out
heat is taken in
no change in temperature whether heat is taken in or given out
All of these
Wien's law states that :
T + λm = constant
λm T= constant
λm/T = constant
T4/ λm = constant
A body cools from 60°C to 50°C in 10min. If room temperature is 25°C , the temperature of the body at the end of next 10 min will be
38.5°C
42.8°C
40°C
45°C
For a gas, the difference between two principal specific heats is 4150 J kg-1 K-1 . What is the specific heat of the gas at constant volume if the ratio of specific heats is 1.4 ?
5186 J kg-1 K-1
10375 J kg-1 K-1
1060 J kg-1 K-1
8475 J kg-1 K-1
A copper block of mass 2.5 kg is heated in a furnace to a temperature of 500o 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)
1.53 kg
1.50 kg
1.55 kg
1.6 kg
If the temperature of the sun is doubled, the rate of energy received on earth will be increased by a factor of
2
4
8
16
Which of the following has the highest specific heat ?
copper
hydrogen
water
silver
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 )
40.16o C
44.23o C
49.99o C
47.23o C
The volume of a liquid is 830 m3 at 30o C and it is 850 m3 at 90o C. The coefficient of volume expansion of the liquid is
Water falls from a height of 500 m. What is the rise in temperature of water at the bottom if the whole energy is used up in heating water ?
0.96o C
1.02o C
1.16o C
0.25o C
