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प्रश्न
What is the Greenhouse effect?
उत्तर
The green house effect is the phenomenon in which infrared radiations of long wavelength given out from the surface of a planet are absorbed by its atmospheric gases to keep the environment at the planet's surface and the lower atmosphere warm.
The green house gases present in the earth's atmosphere play a role similar to that of glass walls of a green house. Hence this phenomenon is called the green house effect.
The increase in the concentration of carbon dioxide due to above human activities is responsible for 60% increase in green house effect
संबंधित प्रश्न
State the effect of an increase of impurities on the melting point of ice.
What do you understand by the term latent heat?
Explain the following temperature vs time graph.
What do you mean by the statement?
'The specific latent heat capacity of fusion of ice is 336 J per g'?
Define the following terms:
(i) Latent heat,
(ii) Latent heat of fusion of ice.
What is the name given to the energy absorbed during a phase change?
Name two factors on which the heat absorbed or given out by a body depends.
Explain the meaning of the term latent heat. State its S. I. unit.
Define the term ‘specific latent heat of fusion’ of a substance.
Why do we feel much comfortable when we sit under a moving fan especially when our body is sweating?
State the main precautions to be taken in finding the latent heat of steam.
Steam at 100°C is passed over 1000 g of ice at 0°C. After some time, 600 g of ice at 0°C is left and 450 g of water at 0°C is formed. Calculate the specific latent heat of vaporization of steam (Given: specific heat capacity of water = 4200 J/kg°C, specific latent heat of fusion of ice = 336,000 J/kg.)
1 kg of water is contained in a 1.25 kW kettle. Assuming specific heat capacity of water = 4.2 J/g °C and specific latent heat of vaporization = 2260 J/g, calculate:
(i) the time taken for the temperature of water to rise from 25°C to its boiling point,
(ii) the mass of water which evaporates per minute from the boiling water.
If pressure increases, the melting point of a substance ______.
Find the odd one out and give its explanation.
