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    Physics
    Fluid-Mechanics
    Easy

    Question

    In previous question, if 15 cm of water and spirit each are further poured into the respective arms of the tube, difference in the level of mercury in the two arms is (Take, relative density of mercury =13.6)

    1. 0.20 cm
    2. 0.22 cm
    3. 0.27 cm
    4. 0.26 cm

    The correct answer is: 0.22 cm

      P subscript 1 equals h subscript y rho subscript w g equals left parenthesis 10 plus 15 right parenthesis cross times 1 cross times g equals 25 g table attributes columnalign left columnspacing 1em rowspacing 4 pt end attributes row cell P subscript 2 equals h subscript s rho subscript s g end cell row cell equals left parenthesis 12.5 plus 15 right parenthesis cross times 0.8 cross times g equals 22 g end cell row cell P subscript 1 minus P subscript 2 equals h rho g end cell row cell 25 g minus 22 g equals h cross times 13.6 cross times g end cell row cell therefore h equals fraction numerator 3 over denominator 13.6 end fraction equals 0.22 cm end cell end table

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