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प्रश्न
Give reasons 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 oil tin to draw oil out: one hole allows atmospheric pressure to act as air enters, and the other lets the oil come out easily.
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संबंधित प्रश्न
What do you mean by atmospheric pressure?
Write the numerical value of the atmospheric pressure on the surface of earth in pascal.
Mention two demerits of a simple barometer and state how they are removed in a Fortin barometer .
State two advantages of an aneroid barometer over a simple barometer.
How does the atmospheric pressure change with altitude? Draw an approximate graph to show this variation.
What do the following indicate in a barometer regarding weather : gradual fall in the mercury level
At a given place, a mercury barometer records a pressure of 0.70 m of Hg. What would be the height of water column if mercury in barometer is replaced by water? Take density of mercury to be = 13.6 × 103 kg m-3.
The radius of the press plunger and pump plunger are in ratio of 50 : 4. If an effort of 20 kgf acts on the pump plunger, calculate the maximum effort which the press plunger can over come.
State two advantages of an aneroid barometer.
What will be the effect on air pressure if the temperature drops? Why?
