On which principle lactometer and hydrometer are based?

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Archimedes' Principle
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hydrometer is based on Archimedes' principle that a solid suspended in a fluid will be buoyed up by a force equal to the weight of the fluid displaced. Thus, the lower the density of the substance, the farther the hydrometer will sink. A Lactometer measures the cream content of milk. The more cream,...
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hydrometer is based on Archimedes' principle that a solid suspended in a fluid will be buoyed up by a force equal to the weight of the fluid displaced. Thus, the lower the density of the substance, the farther the hydrometer will sink. A Lactometer measures the cream content of milk. The more cream, the lower the lactometer floats in the milk. Source(s): read less
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Archimedes' principle
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Lactometer works upon the principle of specific gravity while hydrometer works on the principle of archimedes principle i.e. the weight of the object equals to the weight of liquid displaced by the object
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Operation of the hydrometer is based on Archimedes' principle that a solid suspended in a fluid will be buoyed up by a force equal to the weight of the fluid displaced. Thus, the lower the density of the substance, the farther the hydrometer will sink. A Lactometer measures the cream content of milk....
read more
Operation of the hydrometer is based on Archimedes' principle that a solid suspended in a fluid will be buoyed up by a force equal to the weight of the fluid displaced. Thus, the lower the density of the substance, the farther the hydrometer will sink. A Lactometer measures the cream content of milk. The more cream, the lower the lactometer floats in the milk. read less
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