540 g of ice at 0o C is mixed with 540 g of water at 80o C. The final temperature of the mixture is
40o C
79.9o C
80o C
0o C
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
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
Calorimeters are made of which of the following ?
glass
metal
wood
either (a) or (b)
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
527°C
273°C
873°C
927°C
Which of the following has the highest specific heat ?
copper
hydrogen
water
silver
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
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
