ME330_S07_HWSet3A - ME 330 Fluid Mechanics Department of...

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ME 330 Fluid Mechanics Spring 2007 Department of Engineering Western Kentucky University CHAPTER 3A HW - Homework Solutions Problem #’s 3-1C, 3-3C, 3-5C, 3-8E and 3-16, Due February 2, 2007 3-1C Solution We are to discuss the difference between gage pressure and absolute pressure. Analysis The pressure relative to the atmospheric pressure is called the gage pressure , and the pressure relative to an absolute vacuum is called absolute pressure . Discussion Most pressure gages (like your bicycle tire gage) read relative to atmospheric pressure, and therefore read the gage pressure. 3-3C Solution We are to examine a claim about absolute pressure. Analysis No, the absolute pressure in a liquid of constant density does not double when the depth is doubled . It is the gage pressure that doubles when the depth is doubled. Discussion This is analogous to temperature scales – when performing analysis using something like the ideal gas law, you must use absolute temperature (K), not relative temperature ( o C), or you will run into the same kind of problem.
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This homework help was uploaded on 04/19/2008 for the course ME 330 taught by Professor An during the Spring '08 term at Western Kentucky University.

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ME330_S07_HWSet3A - ME 330 Fluid Mechanics Department of...

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