2. 35 points A fire truck is sucking water from a river and delivering it through a longhose to a nozzle. The total length of the galvanized iron hose -

corrected for valves,fittings, entrance, etc. – is 90 [m]. The energy provided by the fire truck for pumping thewater is 53 [kJ/kg]. What hose diameter is needed for the pump to achieve an average velocity of 30[m/s]?

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