Physics

posted by .

A fire hose 10 cm in diameter delivers water at the rate of 23 kg/s. The hose terminates in a nozzle 3.1 cm in diameter.
(a) What is the flow speed in the hose?
(b) What is the flow speed in the nozzle?

  • Physics -

    (a) The volume flow rate Q is the mass flow rate divided by the density.
    Q = 23/1000 = 0.023 m^3/s
    Q = V*A, where A is the cross sectinal area, (pi/4)*D^2 = 10^-2 m^2
    and V is the flow speed
    V = .023/10^-2 = 2.3 m/s

    (b) Q remains contant in the nozzle, but V increases because of the reduction in A. A is reduced by a factor (10/3.1)^2 = 10.4. V increases by the same factor.

Respond to this Question

First Name
School Subject
Your Answer

Similar Questions

  1. physics

    Water flowing through a garden hose of diameter 2.77 cm fills a 25.0 L bucket in 1.20 min. (a) What is the speed of the water leaving the end of the hose?
  2. Math

    A fire hose has a circular cross-section which has a diameter of 20 cm. The hose is full of water and the water in the hose is flowing at a speed of 5m/s. How many liters of water can flow from the hose in 1 minute?
  3. PHYSICS!!!

    Water flowing through a garden hose of diameter 2.72 cm fills a 25.0-L bucket in 1.10 min. (a) What is the speed of the water leaving the end of the hose?
  4. physics

    Water flowing through a garden hose of diameter 2.73 cm fills a 25.0-L bucket in 1.20 min. (a) What is the speed of the water leaving the end of the hose?
  5. Physics

    Water flowing through a garden hose of diameter 2.77 cm fills a 25.0-L bucket in 1.40 min. (a) What is the speed of the water leaving the end of the hose?
  6. Physics

    Water flowing through a garden hose of diameter 2.77 cm fills a 25.0-L bucket in 1.40 min. (a) What is the speed of the water leaving the end of the hose?
  7. Physics

    Water flowing through a garden hose of diameter 2.77 cm fills a 25.0-L bucket in 1.40 min. (a) What is the speed of the water leaving the end of the hose?
  8. Physic

    Water flowing through a garden hose of diameter 2.77 cm fills a 25.0-L bucket in 1.40 min. (a) What is the speed of the water leaving the end of the hose?
  9. Physics

    A particular garden hose has an inside diameter of 15/16 in. The nozzle opening has a diameter of 5/16 in. When the flow speed of the water in the hose is 0.58 m/s, what is the flow speed through the nozzle?
  10. physics

    water flow at 0.65m/s through a 3-cm diameter hose.at the end of the hose is a 0.3cm diameter nozzle,at what speed does the water pass through the nozzle?

More Similar Questions