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Homework Help: Garden Hose

  1. Dec 11, 2007 #1


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    1. A garden hose has an internal diameter of 1.5cm. It's connected to a sprinkler that consists merely of an enclosure with 14 holes, each .20 cm in diameter. The water in the hose moves with a speed of 3.0m/s. At what speed does the water leave the sprinkler?

    OK, so some relevant equations I think would be area- 1/2*pi*r^2. Where i go from there i'm not sure. I also know that the water should leave at a faster speed since it is being forced through many smaller holes.

    Your thoughts?
  2. jcsd
  3. Dec 11, 2007 #2


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    The volume of water passing a point in the thick section in a certain time must equal the volume passing through the sprinkler in the same time. That makes sense since if this was not true some water would have gone missing somewhere. What will be the volume of water passing a point in the hose for a length of time [itex]\Delta T[/itex]?
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