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Q.

A Lactometer and a Hydrometer are based on ____ principle.


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Detailed Solution

A Lactometer and a hydrometer are based on Archimedes' principle.
A hydrometer measures the density of fluid while a lactometer measures the purity of the milk. Lactometers and hydrometers both are based on Archimedes’ principle, which states that when an object is immersed in a fluid, it experiences an upthrust or upward force equal to the weight of the fluid displaced by it.
 
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