A flow nozzle is to be installed in a 5-in Type K copper tube carrying linseed oil at 77°F. A mercury manometer is to be used to measure the pressure difference across the nozzle when the expected range of the flow rate is from 700 gal/min to 1000 gal/min. The manometer scale ranges from 0 to 8.0 in of mercury. Determine an appropriate diameter of the nozzle.