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A 10-hp, 250-V shunt motor has an armature circuit resistance of 0.5 Ω and a field resistance of 200 Ω. At no load, rated voltage, and 1200 r/min, the armature current is 3 A. At full load and rated voltage, the line current is 40 A, and the flux is 5% less than its no-load value because of armature reaction. Compute the full-load speed.
A thermocouple enclosed in a 3.2mm stainless steel sheath (e = 0.6) is inserted horizontally into a duct to measure the air temperature inside. The walls of the duct are at 650o C, and the true air temperature is 560o C. What temperature will be in..
The speed of the rotor rotating magnetic field with respect to the stator rotating magnetic field in r/min.
What are Denbigh reactions? Explain its specialcases.?Denbigh (1958) was the first to treatthe following rather general reaction schemeA1R3S-rA= k12CArR= k1CA - k34CRrS= k3CR24rT= k2CArU= k4CATUk12= k1+ k2k34= k3+ k4With CAo+ CRo+ CSo+ CTo+ CUo= C..
Calculate the line voltage at the secondary terminals of the transformer if the load is disconnected from the transformer. Assume that the input voltage to the transformer remains unchanged. Neglect core loss and magnetizing current
A standard practice in refineries is to use a holding tank in order to mix the light naphtha output of the refinery for quality control. During the first six hours of operation of the refinery, the stream feeding the holding tank at 200 kg/min had 30..
A string of negligible diameter is drawn down the center-line of a pipe containing a Newtonian fluid. At what velocity, w, must the string be drawn in order to vaporize the fluid?
In an experiment to determine specific gravity of a soil sample, the following data is obtained:Mass of empty pycnometer 20.4 g Mass of pycnometer with soil sample 51.6 g Mass of pycnometer with soil sample filled with water 88.6 g Mass of pycnome..
Compute the theoretical density of diamond given that the C-C distance and bond angle are 0.154 nm and 109.5°, respectively. How does this value compare with the measured density?
Determine the effective thermal conductivity of the composite for the arrangement - What is the ratio of the skin's heat loss per unit area for the windy day to that for the calm day?
1) Calculate the quantity of pure make up oxygen to be supplied, (in kg/h), in steady state operation.
A problem similar to it will be on the exam. He kind of went over it, but the whole class was struggling a more in depth/intuitive walkthrough of this problem.
Component Mass in Final State, Please solve specific problem below rather than providing examples. A rigid vessel having a volume of 0.028m^3 initially contains a mixture at 21 degrees Celsius and 100 kPa consisting of 79% Nitrogen
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