Advertisements
Advertisements
प्रश्न
Why does a fountain pen leak at high altitude?
उत्तर
A fountain pen filled with ink contains some air at a pressure equal to atmospheric pressure on earth's surface. When pen is taken to an altitude, atmospheric pressure is low so the excess pressure inside the rubber tube forces the ink to leak out.
APPEARS IN
संबंधित प्रश्न
We do not feel uneasy even under the enormous atmospheric pressure. Give a reason.
A partially inflated balloon is placed inside a bell jar connected to a vacuum pump. On creating vacuum inside the bell jar, balloon gets more inflated. How does the pressure change: increase, decrease or remains same, inside the (a) bell jar, (b) balloon?
Draw a simple labelled diagram of a Fortin barometer and state how it is used to measure the atmospheric pressure.
What do the following indicate in a barometer regarding weather : Gradual rise in the mercury level?
The normal atmospheric pressure is :
The atmospheric pressure at earth's surface is P1 and inside mine is P2. They are related as :
At sea level, the atmospheric pressure is 76 cm of Hg. If air pressure falls by 10 mm of Hg per 120m of ascent, what is the height of a hill where the barometer reads 70 cm Hg. State the assumption made by you.
Select the correct option.
As we move upwards, the atmospheric pressure
A solid weighs 2.10 N in air. It has a relative density of 8.4. How much will the body weigh if placed: In water
A solid weighs 2.10 N in air. It has a relative density of 8.4. How much will the body weigh if placed: In a liquid of relative density 1.2
