Homework Help: physics

Posted by britt on Monday, November 5, 2012 at 11:16pm.

A hypodermic needle is 2.98 cm in length and 0.28 mm in diameter. What pressure difference between the input and output of the needle is required so that the flow rate of water through it will be 1 g/s?

physics - drwls, Tuesday, November 6, 2012 at 3:22am
The equation you need to answer that question can be found at:
http://en.wikipedia.org/wiki/Hagen%E2%80%93Poiseuille_equation

You will need to look up the viscosity of water. Assume room temperature.

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