Firefighters are holding a nozzle at the end of a hose while trying to extinguish a fire. the nozzle exit diameter is 8 cm, and the water flow rate is 16 m3/min. take the density of water as 1000 kg/m3 and the momentum-flux correction factor as unity.

Question

Determine the average water exit velocity

53.05 m/s

Explanation:

Given information

Volume flow rate,

Diameter d= 8cm= 0.08 m

Assumptions

We know that Q=AV and making v the subject then

where V is the exit velocity and A is area

Area, where d is the diameter

By substitution

To convert v to m/s from m/s, we simply divide it by 60 hence

answer:

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