2. Firefighters are holding a nozzle at the end of a hose while trying to extinguish...

Question

Question

Answer 1

Answer #1

Q = 12m³/min = 12/60 = 02 m³/s

Area of flow = A = Pi x d²/4 , d = 10cm = 0.1m

A = pi * 0.1*0.1/4 = 7.85398 x 10^-3 m²

Velocity = Discharge/Area = 0.2/7.85398 x 10^-3 = 25.464 m/s

Resistance to flow = Discharge x Density of fluid = 0.2 x 1000 = 200 kg/s

Answer 2

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