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Why two holes are made to empty an oil t...

Why two holes are made to empty an oil tin ?

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When oil comes out of one hole with high velocity, the pressure in the tin decreases. To have continuous flow of oil proper pressure is to be maintained inside the tin. To achieve this, atmospheric air has to be entered inside the tin. For this purpose only another hole is made out. Hence two holes are made to empty an oil tin.
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  11. A cappilary of diameter d mm is dipped in water such that the water ri...

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  12. A cylinder of length 1.5 m and diameter 4 cm is fixed at one end. A ta...

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  13. A spherical soap bubble A of radius 2 cm is formed inside another bubb...

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  14. A block of Ag of mass x kg hanging from a string is immersed in a liqu...

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  15. The reading of pressure meter attached with a closed pipe is 5 xx 10^(...

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  16. Why coffee runs up into a sugar lump (a small cube of sugar) when one ...

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  17. Why two holes are made to empty an oil tin ?

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  18. We can cut vegetables easily with a sharp knife as compared to a blunt...

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  19. Why the passengers are advised to remove the ink from their pens while...

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  20. We use straw to suck soft drinks, why ?

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