Advertisements
Advertisements
प्रश्न
Why is it not advisable to use a fountain pen while travelling in an aeroplane?
Advertisements
उत्तर
Fountain pens are built in such a way that the pressure inside them balances the atmospheric pressure at sea level. Since atmospheric pressure decreases with an increase in height above sea level, the pressure inside the pen turns out to be much greater than the air pressure in an aeroplane and the pen starts leaking.
APPEARS IN
संबंधित प्रश्न
Nose bleeding may occur at a high altitude because
What do you mean by atmospheric pressure?
How is the reading of a barometer affected when it is taken to (i) a mine, and (ii) a hill?
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 1.04 x 105 Pa. Assuming g = 10 m s-2 and density of air to be uniform and equal to 1.3 kg m-3, find the height of the atmosphere.
Convert 1 mm of Hg into pascal. Take density of Hg = 13.6 x 103 kg m-3 and g = 9.8 m s-2 .
Give reasons for the following:
The Westerlies in the Southern Hemisphere blow with greater force than those in the Northern Hemisphere.
State two advantages of an aneroid barometer.
Describe an experiment to demonstrate that air exerts pressure.
What is meant by atmospheric pressure?
