Answer to Question #272954 in Physics for Girl

Question

2)     A fire hose with inside diameter 12.7 cm is attached to a street-level hydrant where the water pressure is 515 kPa. The hydrant delivers water to the hose at 340 L/min. Firefighters have taken the nozzle of the hose to the third floor of a nearby building, 7.80 m above street level.

 

a.      Determine the

                                       i.   volume flow rate of water delivered to the nozzle in

                                                        ii.     flow speed into the hose.

                                                      iii.     flow speed through the nozzle which has a diameter of 1.91 cm.

                                                       iv.     pressure at the nozzle.

b.      Comment on your answers to parts a(iii) and a(iv) for this particular application of fluid mechanics.

c.      Determine the Reynolds number of the flow at the nozzle given that the density of water is

 and its dynamic viscosity is  at . Is the flow laminar?

 

Answer 1

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