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Q.

The average speed of blood in the artery (diameter =1cm) during the resting part of heart's cycle is about  20cms−1 . Is the flow laminar flow or turbulent? Density of blood  1.05×103kgm−3  and η=2.7×10-3Pa s

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a

Laminar

b

Turbulent

c

Both

d

None

answer is A.

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Detailed Solution

V=R.ηρD R=vρDη=20×10-2×1.05×103×1×10-22.7×10-3=770<2000 Therefore fluid s laminar
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The average speed of blood in the artery (diameter =1cm) during the resting part of heart's cycle is about  20cms−1 . Is the flow laminar flow or turbulent? Density of blood  1.05×103kgm−3  and η=2.7×10-3Pa s