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JEE Main 8 Apr 2019 Paper 1 Solved Paper
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© examsnet.com
Question : 29
Total: 91
Water from a pipe is coming at a rate of 100 liters per minute. If the radius of the pipe is 5 cm, the Reynolds number for the flow is of the order of : (density of water =1000 kg/
m
3
, coefficient of viscosity of water= 1 mPa s)
10
4
10
3
10
2
10
6
Validate
Solution:
R
e
=
ρ
D
V
η
=
10
3
×
10
−
1
×
100
×
10
−
3
60
×
π
×
(
10
−
2
)
×
1
×
10
−
3
×
4
⇒
4
6
π
×
10
5
=
2.1
×
10
4
Order of 4
© examsnet.com
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