Given, diameter of tap, D=1.25cm =1.25×10−2m Density of water, ρ=103kgm−3 Coefficient of viscosity, η=10−3Pa−s Volume of water flowing out per second Q=3L∕min =
3×10−3
60
=5×10−3m3s−1 As, Q=vA=v×
πD2
4
⇒ v=
4Q
D2π
Reynold's number is given by Rr=
ρvD
n
=
4ρQ
πDη
=
4×103×5×10−5
314×1.25×10−2×10−3
= 5095 For Reynold's number, the flow of liquid is turbulent if Rc>3000. Hence, the nature of flow of water is turbulent.