Water flow at a speed of `7cm s^(-1)` through a pipe of tube of radius `1.5 cm`. What is the nature of the flow ? Cofficient of viscosity of water is `10^(-3) kg m^(-1) s^(-1)` and its density is `10^(3) kg m^(-3)`

Explanation

Here, `v_(c)=7 cm s^(-1)=0.07 ms^(-1)`,
`D=2 r=2xx0.05=0.03 m`
`eta=10^(-3) kg m^(-1) s^(-1), rho=10^(3) kg m^(-3)`
`N_(R)=(rho v_(c)D)/(eta)=(10^(3)xx0.07xx0.02)/(10^(-3))=2100`
`A_(s) N_(R)gt 2000` but less than `3000`, hence the flow is uncertain.