functions of hydrometer
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hydrometer is an instrument used for measuring the relative density of liquids based on the concept of buoyancy. ...
A hydrometer usually consists of a sealed hollow glass tube with a wider bottom portion for buoyancy, a ballast such as lead or mercury for stability, and a narrow stem with graduations for measuring.
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A hydrometer is an instrument used to determined specify gravity. it oprate is based on Archimedes principal that a solid bodes displaced it own weight liquid in which it flows
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