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A four-pole, dc series motor has a lap-connected, two-layer armature winding with a total of 400 conductors. Calculate the gross torque developed for a flux per pole of 0.02 Wb and an armature current of 50 A. (Note: The number of parallel paths is equal to the number of poles for lap windings.)
High-density polyethylene may be chlorinated by inducing the random substitution of chlorine atoms for hydrogen.
Compute the mean and variance for each of the following activities: Activit y A B C D E F G H I J Optimisti c 5 3 18 9 8 1 45 12 7 22 Pessimisti c 10 21 32 11 8 10 95 15 11 80 Most Likely 7 15 25 10 8 6 60 13 9 60
Calculate the required value of Ta1 if the film temperature falls to 34°C, and the value if it rises to 36°C.
If the armature is wave wound, calculate the voltage induced in the armature, given that the number of parallel paths is equal to 2 for wave windings.
Calculate the standard enthalpy of combustion per gram of liquid methanol and compare this answer to that for ethanol in Exercise 75.
Draw the cycles on P-h and T-s diagrams
Terminal voltage on the high-voltage side when the transformer is delivering full load at 230 V and 0.866 power factor lagging.
At full load and rated voltage, the line current is 65 A. Assume the field flux to be reduced by 6% from its value at no load, due to the demagnetizing effect of armature reaction. Compute the full-load speed.
For the following cases: How much energy is lost every day when the steam temperature is maintained at 200oC, and the surrounding average air temperature is 20.0oC, and the surroundings average air temperature is 20.0oC? Neglect losses though the end..
A silicon diode is forward-biased with V = 0.5 V at a temperature of 293 K. If the diode current is 10 mA, calculate the saturation current of the diode.
Estimate the concentration of the substrate at the surface of the immobilized enzyme
If the slip-ring voltage is 400 V, when the rotor frequency is 120 Hz, at what speed must the rotor be driven in order to give 150 Hz at the slip-ring terminals? What will the slip ring voltage be in this case?
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