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Sagot :
Gravity bulb of hydrometer is made heavier so that its centre of gravity remains very low, when it is floating in denser liquids.
Answer:
The bottom of the hydrometer is made heavier by loading it with lead shots so that it floats vertically with some of its portion outside the surface of the water in the jar.
Explanation:
A 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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