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  4. A beaker with a liquid of density 1.4 g cm -3 is in balance over one pan of a weighing machine. If a solid of mass 10 g and density 8 g cm -3 is now hung from the top of that pan with a thread and sinking fully in the liquid without touching the bottom, the extra weight to be put on the other pan for balance will be

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Q. A beaker with a liquid of density $1.4 \,g \,cm ^{-3}$ is in balance over one pan of a weighing machine. If a solid of mass 10 g and density $8 \,g \,cm ^{-3}$ is now hung from the top of that pan with a thread and sinking fully in the liquid without touching the bottom, the extra weight to be put on the other pan for balance will bePhysics Question Image

Mechanical Properties of Solids

Solution:

Since beaker and the solid are on the same areas, the upthrust and its reaction are balanced.
Extra weight required to balance the weight of the solid = 10 g.