what are the uses of lactometer and hydrometer? and how does it work?
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hydrometer is a device used to find relative density of a liquids.it consists of glass body and a bulb weighted by mercury.the liquid to be tested is poured into container and hydrometer is lowered such that it floats freely.the point at which the surface of liquid correlates with the stem of container is the relative density. lactometer is used to check purity of cow's milk
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A hydrometer is an instrument used to determine specific gravity. It operates based on the Archimedes principle that a solid body displaces its own weight within a liquid in which it floats. Hydrometers can be divided into two general classes: liquids heavier than water and liquids lighter than water. and lactometer is used to measure the gravity of milk
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