Air under standard conditions flows through a $3\mathrm{.}0$ cm diameter

commercial steel pipe. Determine the pressure drop in a $1-$m section

of the pipe if the volumetric flow rate is $0\mathrm{.}125.$

Assume that the density of air does not vary significantly, therefore the

incompressibility assumption holds.

Pipe Flow Calculation

$$ replace the pipe with PVC pipe?

$$ increase the flow rate?

$$increase the pipe diameter??