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Two coupled synchronous machines are used as a motor-generator set to link a 25-Hz system to a 60-Hz system. Find the three highest speeds at which this linkage would be possible.
question 1 two well of radius 18 inches are constructed in a confined aquifer 150 ft thick with hydraulic conductivity
If the pounds of water evaporated per pound of steam equals 0.85 x number of effects, determine the optimum number of effects for minimum annual cost.
Problem 1: For the circuit given in Figure 1 the power factor is 0.72 lagging and the power dissipated is 375 W.
The potential energy between two atoms A and B are constants and r the interatomic separation distance.
Figure shows an x-ray diffraction pattern for a-iron taken using a diffract meter and monochromatic x-radiation having a wavelength of 0.1542 nm; each diffraction peak on the pattern has been indexed.
Determine whether a linear correlation of y with x accounts for all but the error variation in y from the following replicate values of y at different levels of x.
What is the drawdown at the perimeter of the well pumping 225 gpm when both wells are operating?
Using an average value of 2.4 for the volatility of benzene relative to toluene, calculate the number of theoretical plates required at total reflux. Also calculate the minimum reflux ratio, if the feed is liquid and at its boiling point.
Perform the material balance and energy balance calculations for the process on the basis of 100 kg magnetite charged. Also
Water at 1 bar, 20 °C is heated at const P to produce steam with quality 95%. What is the amount of heat? What is the final state if the amount of heat is 2100 kJ/kg?
A profit-producing property has an initial value of $50,000, a service life of 10 years and zero salvage and scrap value. By how much would annual profits before taxes be increased if a 5 percent sinking-fund method were used to determine deprecia..
The product may bemobile or immobile; since the reaction is irreversible, it does not matter. Thisreaction shows the solute's penetration across the film. Write mass balancesfor the solute and the immobile reagent.
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