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प्रश्न
Explain why holes are made in hanging banners and hoardings.
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उत्तर १
Air exerts pressure. Wind blowing in high speed may break or displace many things. If holes are made in hanging banners and hoardings, then air can pass through these holes, which reduces the air pressure exerted on the banners and hoardings. That is why holes are made in hanging banners and hoardings
उत्तर २
Air exerts pressure. Due to this pressure banners and hoarding flutter and torn when wind is blowing fast. Holes are made in banners and hoardings so that wind passes through the holes and they do not become loose and fall down.
संबंधित प्रश्न
What do you understand by atmospheric pressure?
What is a barometer?
How is the reading of a barometer affected when it is taken to (i) a mine, and (ii) a hill?
Why does a fountain pen leak at high altitude?
Why does nose start bleeding on high mountains?
The atmospheric pressure at earth's surface is P1 and inside mine is P2. They are related as :
Give reasons for the following:
As we go higher, the atmospheric pressure decreases.
Draw a simple diagram of a Fortin's barometer and state how it is used to measure the atmospheric pressure.
The atmosphere is a layer of gases surrounding the planet.
It is much easier to burst an inflated balloon with a needle than by a finger. Explain.
