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MMLU / Fire hoses always have a nozzle on the end of the hose, which in part works by…

Problem

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question

Fire hoses always have a nozzle on the end of the hose, which in part works by decreasing the area of the water exiting the fire hydrant to create a more forceful stream. If the starting velocity of water from a fire hydrant is 2 m/s, pressure is kept constant, and the end of the nozzle is 1/3 the area of the start of the hose, what is the final velocity of water as it exits?

choices

  1. 2 m/s
  2. 8 m/s
  3. 5 m/s
  4. 6 m/s

subject

college_medicine

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