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Working of Salt Bridge

An open U-tub...

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An open U-tube of unifrm cross section contains mercury . When 27.2 cm water is poured into one limb of tube. What is the difference in levels of two sides \lbrack ρ_{water}=1 gm/cm^3 , ρ_{mercury}=13.6 gm/cm^3\rbrack.

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Q. The area of cross-section of one limb of an U-tube is twice that of the other. Both the limbs contain mercury at the same level. Water is poured in the wider tube so that the mercury level in it goes down by

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, density of mercury =

13.6 \times 10^{3} k g m^{- 3}

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