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Question

Streamline flow is more likely for liquids with

A
high density and high viscosity
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B
low density and low viscosity
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C
high density and low viscosity
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D
low density and high viscosity
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Solution

The correct option is D low density and high viscosity
We know that, if Reynolds number
N<2000 flow is streamline
N>3000 flow is turbulent
and Reynolds number
N=ρvDη where ρ is density, v is velocity, D is diameter of tube and η is co-efficient of viscosity of fluid.
Nρ & N1η
For streamline flow, to have low value of Reynolds number, density of fluid should be low and viscosity should be high.

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