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January 31, 2015

January 31, 2015

Posted by **JJ** on Thursday, January 14, 2010 at 4:33pm.

Calculate the change in pressure between the wide and narrow regions of the pipe. Give your answer as an expression in terms of the density of water, rho, and initial speed v.

- physics -
**drwls**, Thursday, January 14, 2010 at 4:38pmThe incompressible continuity equation

(Area)*(velocity) = constant

tells you that the speed is 1/4 as high in the wider section. Thus v' = v/4 is the new velocity.

Use the Bernoulli equation to complete the problem. The pressure increase equals the decrease in (1/2)(rho)V^2

Show your work if you need additional assistance.

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