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प्रश्न
Give reason for the following :
Two holes are made in a sealed oil tin to take out oil from it.
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उत्तर
Two holes are made in a sealed can so that ATMOSPHERIC
AIR presses the oil at one hole and oil comes out of the second hole.
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संबंधित प्रश्न
The atmospheric pressure on earth surface is nearly .............. .
Explain the following :
Two holes are made in a completely filled sealed tin can to take out oil from it .
Explain how is the height of mercury column in tube of a simple barometer, a measure of the atmospheric pressure.
What is an altimeter? State its principle. How is its scale calibrated?
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.
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 briefly, how and why the atmospheric pressure of a place varies with the altitude. Draw an approximate graph to illustrate this variation.
High pressure is called ______.
The increase in internal energy of 1 kg of water at 100°c when it is converted into steam at the same temperature and at 1 atmospheric pressure will be ______.
(density of steam is 0.6 kg m-3, latent heat of vaporisation of water = 2.25 × 106 J kg-1).
