Review from final 04 Probs 1 and 3

# Review from final 04 Probs 1 and 3 - 5.39 5.264 3.084 2.506...

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1. An environmental engineer has obtained bacteria culture from a municipal water sample and allowed the bacteria to grow within a Petri dish. The following data was obtained. Time (s) Bacteria Concentration (in ppm) 0 6 1 9 2 15 3 19 4 32 5 42 6 63 7 102 8 153 9 220 10 328 a) Plot the data several different ways. Use the resulting graphs to solve the following problem: Suppose the growth of Type A bacteria is governed by a process described by the equation C A = a e bt and the growth of Type B bacteria is governed by the process described by the equation C B = a(t b ) b) What type of bacteria is the engineer dealing with?

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2. Does the data set shown below constitute a normal distribution? 1.253 1.243 2.795 4.384 4.786 2.911 1.969 1.841 3.386 5.197 5.525 3.181 2.601 2.832 4.361 5.177 4.99 4.538 3.141 2.64 4.548 1.46 1.371 4.27 3.651 3.511 5.624 2.041 1.711 4.993 4.157 4.065 5.19 2.684 2.399 4.916 4.546 4.808 1.117 2.931 2.753 1.173 5.087 5.335 2.01 3.596 3.027 1.67 5.277 5.274 3.013 4.424 4.376 2.355 1.175 1.272 2.858 4.376 4.535 3.18 1.904 1.657 3.624
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Unformatted text preview: 5.39 5.264 3.084 2.506 2.644 4.115 4.991 5.01 4.809 2.92 2.87 4.654 1.306 1.271 4.156 3.767 3.243 5.634 1.804 1.805 5.267 4.322 4.169 5.228 2.872 2.276 4.784 3. The figure below shows three reactors linked by pipes. As indicated, the rate of transfer of chemicals through each pipe is equal to the flow rate (Q i , with units of cubic meters per second) multiplied by the concentrations of the reactor from which the flow originates (c i , with units of milligrams per cubic meter). If the system is at a steady state, the transfer into each reactor will balance the transfer out. Develop mass-balance equations for the reactors and solve the three simultaneous linear algebraic equations for their concentrations using either Excel or MATLAB. 1 2 3 400 mg/s Q 13 c 1 200 mg/s Q 33 c 3 Q 23 c 2 Q 12 c 1 Q 21 c 2 Q 33 =120 Q 13 =40 Q 12 =80 Q 23 =60...
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Review from final 04 Probs 1 and 3 - 5.39 5.264 3.084 2.506...

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