Look around and find out how water is pumped up from the ground to higher places.
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Higher working capital usually results in (a) higher current ratio, higher risk and higher profits
(a) Working capital of a firm refers to the amount of current assets which are in excess over current liabilities. If a company has a higher working capital then there will...
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A beaker containing a liquid is kept inside a big closed jar. If the air inside the jar is continuously pumped out,
(b) decrease EXPLANATION: The pressure at the bottom of the liquid is the sum of atmospheric pressure and the pressure due to the height of the liquid. When the air inside the...
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A closed vessel is half filled with water. There is a hole near the top of the vessel and air is pumped out from this hole.
(b) The pressure at the surface of the water will decrease. (c) The force by the water on the bottom of the vessel will decrease. EXPLANATION: The option (a) is not true because...
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Light passes through a closed cylindrical tube containing a gas. If the gas is gradually pumped out, the speed of light inside the tube will
(a) increase
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Suppose the glass of the previous problem is covered by a jar and the air inside the jar is completely pumped out. (a) What will be
(a) In this case the atmospheric pressure on the surface of the water = zero. Hence, the pressure of water at the bottom of the glass =ρgh =1000*10*(20/100) N/m² =2000 N/m² Hence the...
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Look at the table on page 25 of the textbook . If Neinuo wanted to eat rice, which are the places she should have visited?
If Neinuo wanted to eat rice she should have gone to the state of West Bengal (a major rice product area).
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Look at the pictures given on textbook page 49 and guess how the seeds travel and reach different places?
In the first figure, the seed is spreading by a squirrel, in the second by a bird, and in the third by water.
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We still do not have any electricity at many places in our country. Even at places which do not have electricity,
If there is no electricity in our city, there would be great scarcity of water. We would not able to use TV, computers etc. Even the mobile phone would not...
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How is water pumped up using electricity? How is water lifted without electricity?
The electric machines absorb underground water through tube well and pumps it up. Without electricity, water can be lifted using buckets and ropes, windmill and also using bullocks.
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Stand with this snake below a fan. Look in which direction it moves. Take this paper snake to different places and observe its movement.
On taking this snake below a fan, it moves in the anticlockwise direction. This is because, here the air is moving downwards.
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