Physics

Problem

Water

(\rho = 1000\,\mathrm{kg\,m^{-3}})

with dynamic viscosity

\mu = 1.0 \times 10^{-3}\,\mathrm{Pa\,s}

flows through a pipe of diameter

5.0 \times 10^{-2}\,\mathrm{m}

at an average speed of

2.0\,\mathrm{m\,s^{-1}}

. The Reynolds number for the flow is closest to a)

2.0 \times 10^{5}

1.0 \times 10^{4}

1.0 \times 10^{5}

5.0 \times 10^{4}