Calculate the back emf and efficiency of the motor
An electric motor operating at 200 V draws a current of 5 A at its full speed. The resistance of the amature is 10 Ohm. calculate the back emf and efficiency of the motor ?
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Two speakers are driven by the same oscillator at frequency 420 Hz. One speaker is mounted on the ceiling, and the other on the wall at head level, a horizontal distance of 2 m away.
Determine the total electrical work the heat pump can consume on that day. If the heat pump consumes 6.6kW of power while operating, how long the heat pump ran on that day?
Assume that all the terms in the Drake equation have the values given in the text, except for N and L. (a) If there are 1000 civilizations in the Galaxy today, what must be the average lifetime of a technological civilization? (b) What if there ar
If you collect data at SEVERAL restaurants, mixing both the expensive "gourmet" type and the cheap cafeteria type, the correlation between the amount of food served per person and the price paid for it should be:
Suppose you are marooned on an exotic island where the natives happen to speak English. Their ways are primitive, possessing only their natural habitat for food and supplies.
Derive Euler's equations of motions stating all your assumptions. a) write down the equation in vector form and explain the meaning of each term
What is ductile-to-brittle transition temperature? Describe a method to determine ductile-to-brittle transition temperature ( material science and engineering)
Define the admittance of the circuit in complex fork (exponential and Algeriac notation), active and reactive conductivities . Draw the voltage and current vector diagram .
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