Advertisements
Advertisements
Question
Explain the following :
Two holes are made in a completely filled sealed tin can to take out oil from it .
Advertisements
Solution
There is no air inside a completely filled and sealed can. When a single hole is made to drain out the oil from the can, some of the oil will come out and due to that the volume of air above the oil will increase and hence the pressure of air will decrease. But if two holes are made on the top cover of the can, air outside the can will enter it through one hole and exert atmospheric pressure on the oil from inside along with the pressure due to oil column, and it will come out of the can from the other hole.
RELATED QUESTIONS
Fill the missing word in the blank spaces in the following statements:
Air moves from a region of __________ pressure to a region of ________ pressure.
The atmospheric pressure is nearly 105 Pa.
Write the numerical value of the atmospheric pressure on the earth surface in pascal.
Give reason for the following:
Water does not run out of a dropper unless its rubber bulb is pressed.
How does the pressure at a certain depth in sea water differ from that at the same depth in river water? Explain your answer.
Explain the following :
A balloon collapses when air is removed from it.
Clouds float in atmosphere because of their low ______.
Humans are sensitive even to a small variations in pressure.
