A brick suspended from a spring balance is first weighed in water and then in salt solution of density $1.2$ gram per cubic centimetres. In which case the spring balance will show less weight

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When the brick weighed in salt solution

When the brick weighed in water

Either 1 or 2

Both 1 and 2

answer is A.

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Detailed Solution

A brick suspended from a spring balance is first weighed in water and then in salt solution of density

1.2

gram per cubic centimetres. The spring balance will show less weight when the brick is weighed in salt water.
Due to the change in density of the solution, the stone suspended from the spring balance will be less when it is put inside the salt solution. This is because the salt solution has a higher degree of density than simple water. Because of the difference in density between these liquids, the buoyancy of salt solution increases.
The buoyant force is the ascending force exerted on an object entirely or partly immersed in a liquid. This ascending force is also called Upthrust. Due to the buoyant force, a body submerged incompletely or entirely in a fluid appears to lose weight, i.e., to be lighter.