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# hw_02 - Name(s(up to three students per homework set Due In...

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Due: In class, Friday September 16, 2005 Name(s) (up to three students per homework set) : 1. 2. 3. For instructor or TA use only: Problem Score Points 1 15 2 15 3 20 4 15 5 10 6 10 7 15 ME 33 Fall Semester, 2005 Homework Set # 2 Professor J. M. Cimbala Total: 100 1 . (15 pts) Text Problem 1.30 . Do two parts: ( a ) Solve the problem using EES or other software. ( b ) Plug in your answers by hand, and verify that the results are correct to at least 3 significant digits of precision. 2 . (15 pts) A soap bubble of diameter 24.50 mm is filled with air. The absolute pressure outside the bubble is 100.5 kPa. The gage pressure inside the bubble is 15.90 Pa. The temperature both inside and outside of the bubble is 20.00 o C. Give all answers to 4 significant digits. ( a ) Calculate the absolute pressure in kPa inside the bubble. Compare to the pressure outside the bubble and discuss. ( b ) Calculate the density of the air inside and outside the bubble. Compare and discuss. ( c ) Calculate the surface tension of the soapy water. Is the surface tension of the soapy water less than, equal to, or greater
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