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Mechanical Properties Of Fluids

Question

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Why oil spreads on cold water and may remain as a drop on hot water?

Solution

Surface tension of oil is less than cold water and hence oil spreads over cold water. But, surface tension of oil is greater than that of hot water and hence resumes the shape of drop.

Some More Questions From Mechanical Properties of Fluids Chapter

Do intermolecular or inter-atomic forces follow inverse square law?

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

What is fluid?

What is hydrostatics?

What is hydrodynamics?

Can fluids withstand tangential stress?

Can fluids withstand normal stress?

Why the fluids do not have any modulus of rigidity?

Which phase of fluid is more compressible?

What is an ideal liquid?

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