Fire hoses used in major structure fires have inside diameters of 6.4 cm. Suppose such a hose carries a flow of 40 L/s starting at a gauge pressure of 1.62 × 10°N/m². The hose goes 10 m up a ladder to a nozzle having an inside diameter of 3 cm. Assume negligible resistance, density of water is 1000 kg/m³, and atmospheric pressure 1.013×105 Pa. Using the flow rate = (a) Calculate the velocity at the start of the hose. V 12.43 start m/s (b) Calculate the velocity at the nozzle. V 56.59 nozzle m/s (c) Calculate the gauge pressure at the nozzle, P Pnozzle enter the calculated value. If P atm Pnozzle If nozzle <3%, then enter P, = P nozzle 0, else atm <3%, then we are going to assume that the absolute pressure at the nozzle is approximately equal to the atmospheric pressure, making the gauge pressure almost zero when compared to the atmospheric pressure. P nozzle 1.898 × 10 Pa

Fire hoses used in major structure fires have inside diameters of 6.4 cm. Suppose such a hose carries a flow of 40 L/s starting at a gauge pressure of 1.62 × 10°N/m². The hose goes 10 m up a ladder to a nozzle having an inside diameter of 3 cm. Assume negligible resistance, density of water is 1000 kg/m³, and atmospheric pressure 1.013×105 Pa. Using the flow rate = (a) Calculate the velocity at the start of the hose. V 12.43 start m/s (b) Calculate the velocity at the nozzle. V 56.59 nozzle m/s (c) Calculate the gauge pressure at the nozzle, P Pnozzle enter the calculated value. If P atm Pnozzle If nozzle <3%, then enter P, = P nozzle 0, else atm <3%, then we are going to assume that the absolute pressure at the nozzle is approximately equal to the atmospheric pressure, making the gauge pressure almost zero when compared to the atmospheric pressure. P nozzle 1.898 × 10 Pa

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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