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If the temperature of the fluid in Problem 1.1 is to be regulated together with its level, modify the analog control system to achieve the additional control. (Hint: An additional actuator and sensor are needed.) Obtain a block diagram for the two-input-two-output control system with digital control.
Problem 1.1
A fluid level control system includes a tank, a level sensor, a fluid source, and an actuator to control fluid inflow. Consult any classical control text1 to obtain a block diagram of an analog fluid control system. Modify the block diagram to show how the fluid level could be digitally controlled.
Use the Lee-Kesler method- Calculate the entropy of propane at its critical point. The reference state is the ideal-gas state at the critical point.
What are the main limitations of the resolution of a scanning electron microscope (SEM) image? Is resolution strongly dependent on lens numerical aperture (NA)?
What mass of propane must be burned to furnish this amount of energy assuming the heat transfer process is 60.% efficient?
If the transformer is supplying full load at 230 V and 0.8 lagging power factor, determine the voltage regulation of the transformer. Also, find the power factor at the high-voltage terminals.
Propane gas at 22 bar and 423 K is throttled in a steady-state flow process to 1 bar. Estimate the entropy change of the propane caused by this process. In its final state, propane may be assumed to be an ideal gas.
A client is interested in using a voice-recognition system to access the computer. Which of the following factors is least critical to success with this method?
1- Radioactivity is a tendency for an element or a material to ________. emit decay radiation emit light
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the path followed by a fixed amount of a perfect gas during a reversible process is described by the following
The fictitious compound, pandemonium fluoride (PnF2) has a Ksp value in water of 3.091×10-9M3 at room temperature. Calculate the solubility of PnF2 in water. Express your answer in units of molarity.
Design a photolithography and metallization sequence of steps to obtain a Au square and a Ti circle on the surface of a semicond uctor wafer. Draw the shape of the mask to be used. At each appropriate step, indicate whether you use the dire..
Express the diameters in inches and use inside diameters.
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