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A research reactor is operated at a power of 250 kilowatts 8 hours a day, 5 days a week, for 2 years. A fuel element, 1 of 24 in the reactor, is then removed for examination. Compute and plot the activity of the fuel element as a function of time up to 2 years after removal.
A 100-kW, 250-V shunt generator has an armature-circuit resistance of 0.05 Ω and a field circuit resistance of 60 Ω. With the generator operating at rated voltage,
If one of the machines has its field excitation adjusted such that it delivers 125 A lagging current, determine the armature current, power factor, excitation voltage, and power angle of each machine.
Draw circuit diagrams and show polarity markings.
For connection purposes, the sphere is trimmed and connections made to the flat surfaces created by the cuts. The resistance R and source voltage V are known.
Provide a detailed explanation of filters in chemical instrumentation and also describe detectors and a general subscription of the whole system.
Propane gas at 1 bar and 308.15 K (35°C) is compressed to a final state of 135 bar and 468.15 K (195°C). Estimate the molar volume of the propane in the final state and the enthalpy and entropy changes for the process. In its initial state, propan..
Three waveforms seen on an oscilloscope are shown in Figure P1.4.7. If the horizontal scale is set to 50 ms per division (500 ms for the entire screen width), and the vertical scale is set to 5 mV per division (±25 mV for the entire screen height ..
Assume a 10 °F temperature between streams in the heat exchangers and a compressor efficiency of 80%.
What is a Recycle reactor?In some reaction system, it is advantageous to divide the product stream and a partreturned to reactor as recycle to increase the conversion rate. These reactors are calledrecycle reactors.
explain how a supercritical flow changes to a subcritical flow. You may need to refer text books and web pages to answer this question.
If the velocity of the carriers is 2000 m/s, how many free charges (electrons) must be present in the device at all times?
The cost of baking a cake is $6, and demand is estimated to be normally distributed, with a mean of 25 and a standard deviation of 4. What is the optimal stocking level?
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