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1. In which one of the following cases will the liquid flow in a pipe be most streamlined

(a)  Liquid of high viscosity and high density flowing through a pipe of small radius

(b)   Liquid of high viscosity and low density flowing through a pipe of small radius

(c)   Liquid of low viscosity and low density flowing through a pipe of large radius

(d)   Liquid of low viscosity and high density flowing through a pipe of large radius

Answer-b

(7)

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