HW18Sol - Jim Guinns PHYS2211 Assignment #18 Due Wed., Apr....

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Jim Guinn’s PHYS2211 Assignment #18 Due Wed., Apr. 21, 2010 1. A garden hose has an intake opening of approximately 4.00cm 2 . The other end of the hose is attached to a sprinkler with a total output area of about 0.500cm 2 . As the water leaves the sprinkler it goes straight up into the air to a height of 3.50m before coming back down. What is the speed of the water at the intake end of the hose? If the water at the sprinkler end of the hose goes up to a height of 3.50m we can use that to determine the initial speed of the water as it leaves the sprinkler. With v 2 = v o 2 + 2a x , 0 = v o 2 + 2 (-9.80m/s 2 ) (3.50m) , or v o 2 = 68.6m 2 /s 2 , so v o = 8.28m/s . Now using the continuity equation we have A 1 v 1 = A 2 v 2 , or v 1 = A 2 v 2 / A 1 = (0.500cm 2 ) (8.28m/s) / (4.00cm 2 ) , so v 1 = 1.04m/s . 2. Approximate the shape of an airfoil with the triangular shape shown. The bottom side is 2.00m long and the triangle is 30.0cm high.
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This note was uploaded on 09/25/2011 for the course PHYSICS 22 taught by Professor Lomant during the Spring '11 term at Georgia Perimeter.

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HW18Sol - Jim Guinns PHYS2211 Assignment #18 Due Wed., Apr....

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