Fall+2006+Midterm - BME 221 Fall 2006 Midterm Exam _ UM ID#...

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Midterm Exam ______________________________________ ____________________________ Name UM ID# Note: if you cannot calculate certain values which are needed for the next part of the question, assume a reasonable value and continue the calculation with this value. 1) Your 10 year old little sister, brother, nice, or nephew made a drawing of an elaborate machine and comes running to you (the engineer) all excited. The kid announces that this machine is designed in such a way that it will rotate forever once it starts going just by putting it on the table. The kid announces: i) the machine is designed to make use of gravitational forces. ii) No input of energy is required and even better (iii) the machine could produce electricity. A) Do you think this ingenious invention is feasible (3P) ? B) Why (7P) ? 2) Many drug molecules have limited solubility in water. When the solution is heated (temperature is increased) usually more of the drug dissolves. Give a possible explanation in thermodynamic terms (10P) . 3) A) Explain why for a small swimming bacterium water appears to have an effective viscosity that is larger than the viscosity of corn syrup would appear for humans (6P) . B)
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Fall+2006+Midterm - BME 221 Fall 2006 Midterm Exam _ UM ID#...

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