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A typical main irrigation canal consists of several pools separated by gates that are used for regulating the water distribution from one pool to the next. In automatically regulated canals, the controlled variables are the water levels, the manipulated variables are the gate positions, and the fundamental perturbation variables are the unknown off take discharges.Draw a block diagram of the control scheme.
The heat capacity is defined as the amount of energy required to change the temperature of an object. The specific heat capacity is defined as the amount of energy required to change the temperature of an object per mole of the substance.
A mixture of 65 mol% methane, 30 mol% hydrogen, and 5 mol% nitrogen is burned to heat a boiler used to produce hot steam. The ratio of CO2 to CO in the exhaust gas is 10:1. If 30% excess air is supplied, determine the concentration of the exhaust g..
Application: Spot welding of sheet stock. In an electric spot welding machine, the electrodes are circular with diameter d = 10 mm. Two sheets of steel are welded together (Figure 7.47). H the power density (in steel) required for welding is 108 W..
the equilibrium constant K for the reaction - what is the concentration of SO3 at equilibrium?
Comment on whether the device is operating in the depletion mode or in the enhancement mode.
When algae growing in water containing only 16O were furnished carbon dioxide containing 18O, no 18O was found to be evolved from the oxygen gas produced. What conclusions about photosynthesis can be drawn from these experiments?
A chemical company is considering replacing a batch-wise reactor with a modernized continuous reactor. The old unit cost $40,000 when new 5 years ago, and depreciation has been charged on a straight-line basis using an estimated service life of 15..
The additional investment required is $1,250,000, and the additional operating costs are negligible. Is the modification worth making?
What is the expected electron configuration of elemental bohrium?
Using the concept of a mass balance describe how environmental engineers and scientists model the carbon cycle in the earth's atmosphere allowing them to predict build up of CO2 over time.
The voltage across a 4 mF capacitor is (t) = (200,000t 50,000)e-2000t µ(t) V. Find current through the capacitor
For a reversible exothermic elementary catalytic reaction of the type A B, what is the optimum operating reaction temperature at a conversion level , xa = 0.8 given- K1 = exp ( 10 -5000/T) K2 = exp ( 40 - 15000 /T) and maximum allowable temperatu..
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