HW2_ENFP300_2012

# HW2_ENFP300_2012 - ENFP 300 Due date(Quiz 2 HW#2 Please...

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ENFP 300 Due date: 02/23/2012 (Quiz 2) HW #2 Please remember to use the FIND, GIVEN, SKETCH, ASSUMPTIONS, ANALYSIS, DISCUSSION approach Problems 1. Some animals can take advantage of the Bernoulli effect to improve their living conditions. A prairie dog burrow usually consists of a tunnel with 2 entrances. One of the entrances is flat, while the second one is typically located at a mound as shown in the figure. When the wind blows over the flat entrance with a velocity V 0 , the mound induces an acceleration in the flow such that the velocity over the mount is 1.07 V 0 . For a wind velocity of 6 m/s, what is the pressure difference (p 1 -p 2 ) that drives a flow of fresh air through the tunnel? If the velocity is doubled, what happens to the pressure difference? Answer: (p 1 -p 2 ) = 3.21 N/m 2 2. You want to take advantage of the existing water line on a building to install a simple sprinkler system. In order to analyze the behavior of the water line, you run a simple test. On the first floor, you open a faucet for a few minutes and determine that the water leaves the faucet at

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HW2_ENFP300_2012 - ENFP 300 Due date(Quiz 2 HW#2 Please...

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