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Byju's Answer
Standard XII
Physics
Streamline Flow
The flow rate...
Question
The flow rate of a water from a tap of diameter
1.25
c
m
is
0.48
L
/
m
i
n
. If the coefficient of viscosity of water is
10
−
3
P
a
s
, what is the nature of flow of water?
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Solution
Let the speed of the flow be V.
The diameter of the tap = d
= 1.25 cm
= 1.25
×
10
−
2
m
Density of water =
ρ
=
10
3
k
g
m
−
3
viscosity =
η
=
10
−
3
Pa s
The volume of the water flowing out per second is
Q =
V
×
π
d
2
4
V =
4
Q
d
2
π
The Reynolds number is given by
R =
ρ
V
d
η
=
4
ρ
Q
π
d
η
=
4
×
10
3
×
Q
3.14
×
1.25
×
10
−
2
×
10
−
3
=
1.019
×
10
8
Q
Hence the flow is turbulent.
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