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A constant immersion hydrometer floats vertically in water when the weight of its float is 30g. When it is made to float in a liquid ( miscible in water ), the weight of its float increased by 10g. Find the weight of the hydrometer when it is floated in a mixture containing equal masses of water and the liquid.

thank your father
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Apply the formula for d(equivalent)=[(Ml+Mw) /(Vl+VW)]. than use Vl=Ml/Dl and Vw=Mw/Dw. Than use the fact for floating mg=D (equivalent)Vg .where you will get m as mass (your anser ) and to find the density of liquid use the equivalent fact for floating g on the liquid) .thanks ask if querry
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