AP EAPCET 25-Aug-2021 Shift 1 Paper

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.