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9. A cylinder containing water up to a height of 25 cm has a hole of cross-section

1/4 cm² in its bottom. It is counterpoised in a balance. What is the initial change in the balancing weight when water begins to flow out

(a) Increase of 12.5 gm-wt

(b) Increase of 6.25 gm-wt

(c) Decrease of 12.5 gm-wt

(d) Decrease of 6.25 gm-wt

Answer-c

(25)

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PrevPrevious8. A large open tank has two holes in the wall. One is a square hole of side L at a depth y from the top and the other is a circular hole of radius R at a depth 4y from the top. When the tank is completely filled with water the quantities of water flowing out per second from both the holes are the same. Then R is equal to

Next10. There are two identical small holes of area of cross-section a on the opposite sides of a tank containing a liquid of density ρ . The difference in height between the holes is h. Tank is resting on a smooth horizontal surface. Horizontal force which will has to be applied on the tank to keep it in equilibrium isNext

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