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प्रश्न
You want to buy a house. Would you like to buy a house having windows but no ventilators? Explain your answer.
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उत्तर १
A house having windows but no ventilators should not be bought. This is because warm air is lighter than cold air and therefore, it goes up. This warm air can go outside the house mostly through ventilators. If there are no ventilators, then the warm air cannot go outside easily.
उत्तर २
No, a house which has no ventilators is not a safe or healthy house to live in. The air circulation is not there in such a house. So, it has no fresh air. Because warm air rises up and goes out through ventilators and fresh air comes in through windows
संबंधित प्रश्न
Write the numerical value of the atmospheric pressure on the earth surface in pascal.
How does the pressure at a certain depth in sea water differ from that at the same depth in river water? Explain your answer.
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Draw a simple labelled diagram of a Fortin barometer and state how it is used to measure the atmospheric pressure.
At a given place, a mercury barometer records a pressure of 0.70 m of Hg. What would be the height of water column if mercury in barometer is replaced by water? Take density of mercury to be = 13.6 × 103 kg m-3.
Atmospheric pressure at sea level is 76 cm of mercury. Calculate the vertical height of the air column exerting the above pressure. Assume the density of air 1.29 kgm−3 and that of mercury is 13600 kgm−3. Why the height calculated by you is far less than the actual height of the atmosphere?
State two factors which affect the atmospheric pressure as we go up.
What is the purpose of a barometer? State two major defects of a simple barometer.
Give reasons:
Why artificial pressure creates in Aircraft?
Define High pressure
