Advertisements
Advertisements
प्रश्न
You want to buy a house. Would you like to buy a house having windows but no ventilators? Explain your answer.
Advertisements
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
Suggest two methods to find out wind direction at a given place.
How is water drawn up from a well by a water pump?
What is a barometer?
Draw a simple labelled diagram of a Fortin barometer and state how it is used to measure the atmospheric pressure.
What is an aneroid barometer? Draw a neat and labelled diagram to explain its construction and working.
The atmospheric pressure at earth's surface is P1 and inside mine is P2. They are related as :
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?
What is an aneroid barometer?
Draw a neat and labeled diagram to explain its construction and working.
What will be the effect on air pressure if the temperature drops? Why?
Give reason:
Air pressure decreases with increasing altitude.
