Lactometer :parity of milk Hydrometer:__________.
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Answer:
specific gravity
Explanation:
A hydrometer is an instrument used to determine specific gravity.
It operates based on the Archimedes principle that a solid body displaces it's own weight within a liquid in which it floats.
Hydrometer can be divided into two general classes:
liquid heavier than water,
and liquid lighter than water.
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