ï»¿ A hollow piece of metal floats in water with 80% of its volume inside the water. Find the percentage of volume submerged when the same is taken on the moon. (The acceleration due to gravity on moon is one-sixth the acceleration due to gravity on the earth). from Physics Mechanical Properties of Fluids Class 11 Manipur Board

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Mechanical Properties of Fluids

Physics Part II

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A hollow piece of metal floats in water with 80% of its volume inside the water. Find the percentage of volume submerged when the same is taken on the moon.

(The acceleration due to gravity on moon is one-sixth the acceleration due to gravity on the earth).

The fractional volume of body submerged in water depends only on the relative density of floating body and is independent of acceleration due to gravity.

Therefore, the percentage of volume submerged is the same when taken on the moon.

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Why solids have definite shape while liquids do not have definite shape?

Solids: Intermolecular forces are very strong and thermal agitations are not sufficiently strong to separate the molecules from their mean position. Solids are rigid and hence they have definite shapes.
Liquids: In liquids intermolecular forces are not sufficiently strong to hold the molecules at definite sites, as a result they move freely within the bulk of liquid, therefore, do not possess definite shapes. Liquids take the same shape as that of the container.
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Do intermolecular or inter-atomic forces follow inverse square law?

No. Intermolecular and inter-atomic forces do not obey the inverse square law.
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What is hydrodynamics?

Hydrodynamics is the branch of science that studies about the force exerted by the fluids or acting on the fluids.
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What is hydrostatics?

Hydrostatics is the branch of fluid mechanics that studies incompressible fluids at rest. The study of fluids at rest or objects placed at rest in fluids is hydrostatics.
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What is fluid?

Any material that can flow is a fluid. Liquids and gases are examples of fluid.

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