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How does viscosity of a fluid vary with temperature ?

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(a) How does viscosity of a fluid vary with temperature ?

(b) Cite examples where surface tension effects play a prominent role.

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viscosity decreases as temperature of a fluid increases. As temperature rises, the kinetic energy of the molecules increases. The molecules become more energetic to move freely and are loosely bonded to each other. The reverse is true for when temperature drops.

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In the word fluid there are two things one is liquid and second is gas. So if temperature is increase for liquid then viscosity is decreased and for gas it will be increased because fast movement of elements.

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