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A 230-V dc shunt motor delivers 30 hp at the shaft at 1120 r/min. If the motor has an efficiency of 87% at this load, find:
(a) The total input power.
(b) The line current.
(c) If the torque lost due to friction and wind age is 7% of the shaft torque, calculate the developed torque.
Materials Properties, Consider the following three engineering materials: (i) low-carbon steel; (ii) alumina; (iii) glass-fiber reinforced polymer.
A concern borrows $50,000 at an annual, effective, compound-interest rate of 10 percent. The concern wishes to pay off the debt in 5 years by making equal payments at the end of each year. How much will each payment have to be?
Problem 1: For the circuit given in Figure 1 the power factor is 0.72 lagging and the power dissipated is 375 W.
Carolina (H2C=CHCHO) is made by selective oxidation of propylene at 2 bar, 350 °C using a molybdenum, iron, and bismuth catalyst on a silica support
You have a heat pump that takes in 256 kW of heat and puts out 604 kW of heat. What is the coefficient of performance (C.O.P.) of the system ( express this value as a fraction)?
If the motor is operating on load with a power angle of -20°, and the excitation is adjusted so that the excitation voltage is equal in magnitude to the terminal voltage, determine the armature current and the power factor of the motor.
High-density polyethylene may be chlorinated by inducing the random substitution of chlorine atoms for hydrogen.
A 10-minute experimental run shows that 75% of liquid reactant is converted to product by a %-order rate. What would be the fraction converted in a half-hour run?
question 1a describe the main purpose of the globally harmonised system of classification and labelling of chemicalsb
Focus Question: How does the volume of mole of methane gas at 300 bar and 298K compare to the volume of one mole of an ideal gas at 300 bar and 298K?
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.
Develop a mathematical model that describes how the pressure in the tank varies with time.
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