Advertisements
Advertisements
प्रश्न
Water falls from a height of 50 m. Calculate the rise in the temperature of water when it strikes the bottom.
(g = 10 ms-2; Specific heat capacity of water = 4200 J / kg°C)
Advertisements
उत्तर
If the whole of the energy due to the fall of water changes into heat energy, and 0°C be the rice in the temperature of water, then
mgh = ms θ°
Or m × 10 × 50 = m × 4200 × θ°
Or θ°, i.e. rise in temperature of water = `("m" xx 10 xx 50)/("m" xx 4200) = 5/42 ^circ "C"`
= 0.119 ° C = 0.12 ° C.
संबंधित प्रश्न
What do you mean by the following statement?
The specific heat capacity of copper is 0. 4 Jg-1 K-1?
The global warming has resulted:
(a) the increase in yield of crops
(b) the decrease in sea levels
(c) the decrease in human deaths
(d) the increase in sea levels
What are other units of heat? Name and define them.
A certain amount of heat Q will warm 1 g of material X by 3°C and 1 g of material Y by 4°C. Which material has a higher specific heat capacity?
1 kg of water freezes to form ice at 0°C. What amount of heat is withdrawn?
Calculate the amount of heat released when 5.0 g of water at 20°C is changed into ice at 0°C.
(Specific heat capacity of water = 4.2 J/g°C
Specific latent heat of fusion of ice = 336 J/g)
_______ is defined as the amount of heat required to raise the temperature of 1kg of a substance by 1°C.
The heat capacity of the vessel of mass 100 kg is 8000 J/°K. Find its specific heat capacity.
Which of the following substances (A, B and C) has the highest specific beat?
