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प्रश्न
Explain, why is water sprayed on roads in evening in hot summer?
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उत्तर
Water has the highest specific heat capacity of 4.2 Jg-1 °C-1. Thus, water absorbs large amount of heat from the roads, but its own temperature does not rise much. Thus, on the whole the roads get cooled.
संबंधित प्रश्न
A refrigerator converts 100 g of water at 20°C to ice at -10°C in 35 minutes. Calculate the average rate of heat extraction in terms of watts.
Given: Specific heat capacity of ice = 2.1 J g-1°C-1
Specific heat capacity of water = 4.2 J g-1°C-1
Specific latent heat of fusion of ice = 336 J g-1
How will climate changes affect the various animal species?
What impact will climate changes have on the crops of food?
What is meant by specific heat capacity?
Name and state the principle used to measure the specific heat capacity of a substance.
The substances like water which have ........... Heat capacity warm up more slowly than substances like iron which have .......... heat capacity.
(b) 2000 J of heat energy is required to raise the temperature of 4 kg of a
metal by 3°c. Which expression gives the specific heat capacity of the metal?
An equal quantity of heat is supplied to two substances A and B. The substance A shows a greater rise in temperature. What can you say about the heat capacity of A as compared to that of B?
_______ is defined as the amount of heat required to raise the temperature of 1kg of a substance by 1°C.
Define specific heat capacity.
