Why two holes are made in a sealed tin cane to take out the oil from it?

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Solution

There is no air inside a completely filled and sealed can. But if two holes are made on the top cover of the can, the 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. That's why there is a need of two holes to take out the oil from a completely sealed tin can.

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Explain

Two holes are made in a sealed oil can to remove oil from it

Give reasons for the following :

(a) A balloon collapses when air is removed from it.

(b) Water does not run out of a drpooer unless its rubber bulb is pressed.

Why two holes are made in an oil can to pour out oil from it?

Explain the following :
(i) A balloon collapses when air is removed from it.
(ii) Water does not run out of a dropper unless its rubber bulb is pressed.
(iii) Two holes are made in a completely filled sealed tin can to take out oil from it.

Q. Assertion :A liquid will flow faster and more smoothly from a sealed can when two holes are punched in the can than when one hole is punched. Reason: The flow becomes streamlined with two holes rather than with one hole.

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