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Posted by on Tuesday, November 13, 2012 at 2:12pm.

The pressure in a fire hose is 20 atm. How high can a firefighter spray water from this hose?
One atm is about 1×105 Pa. The density of water is 1.0 g/ml, or 103 kg/m3. The acceleration of gravity, g, is 9.8 m/s2.

  • physics - , Tuesday, November 13, 2012 at 2:23pm

    Water is flowing through a horizontal pipe at a rate 0.2 m3/s. The pipe narrows from a radius of 10 cm to 4 cm. What is the change in pressure?

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