Weight depends on mass and gravitational acceleration. Mass is proportional to density for a fixed volume. The ratio of weights for the same volume of different substances is equal to the ratio of their densities.
A container is first filled with water and then the entire water is replaced by mercury. Mercury has a density of 13·6 × 10³ kg/m³. If X is the weight of the water and Y is the weight of the mercury, then
Asked in UPSC NDA 1 2016 · Topic: Mechanics (Fluid Statics and Dynamics (Continuity Equation, Bernoulli's Theorem))
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