Natural Gas is flowing through a schedule $40$ steel pipe in Minnesota. The gas is at

$170\backslash$deg F and $10\mathrm{.}2$ psig. The pipe is buried in the ground below the freezing line so the

temperature of the dirt stays a constant $42\backslash$deg F even though the outside air temperature may

vary from $20\backslash$deg F to $110\backslash$deg F$.$ If the flow rate of the gas is $4,800$ SCFM:

a$.$ What is the flow rate in lb$/$hr$?$

b$.$ What should be the nominal pipe diameter for the flow to have a Reynolds number

$($Re$)$ of around $105?$