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A dc power distribution cable has two #6 copper wires. The copper wire table in the textbook lists each wire as having resistance of Ro=.4028 ohms per thousand feet at temperature of 25C. The temperature coefficient of copper is alpha=.004 per C. IF the cable is expected to operate at 75C, then the resistance would be R = Ro +Ro(alpha)(delta*T), where delta*T=50C is the temperature rise above 25C. If the cable is 455 feet long, calculate the resistance of each wire at 75C. Calculate the total cable resistance due to both wires.
Determine the location of the peaks in the following sampled spectrum for the following sine waves: (a.) signal frequency = 300 Hz; sampling frequency = 1 kHz (b.) signal frequency = 600 Hz ; sampling frequency = 1 kHz
The toggle switch has been closed for two minutes. During the first 15 seconds after the closing of the toggle switch, pushbutton I2 was pressed four times. Describe what the status of the motor and the pilot light (PL) will be at the two minute m..
Convert function H(A, B, C) = (AB + C)(AC + B) into both the sum-of-products and product-of-sums forms. Obtain the truth table and express the function in both canonical forms: sum-of-minterms and product-of-Maxterms.
How tall must the antennas be if the link operates on a frequency of 2.450Ghz, D1=5miles, D2=11miles, and the obstruction is 60 feet high?
A 200 resistor, a 10 mH inductor and a 4.7 µF capacitor are connected in a series circuit. a. Is the circuit overdamped, underdamped, or critically damped b. Write the characteristic equation and find the poles of this circuit.
Design a circuit to capture the pressing of buttons (momentary switches). The circuit should have two LEDs "A" and "B", and two buttons, "A" and "B". Whichever button was last pressed should determine which of the two LEDs is lit.
Design a common-emitter BJT amplifier with a gain of -100 (well above 3dB point) and a 3dB point at 100Hz. Assume beta = 100, Ic (quiescent) = 1mA, Vcc=20V. You can omit the output capacitor, but should bypass your emitter resistor.
The maximum ratings for all resistors of this type are 250 (V) and ½ (W). What range of resistance values are limited by the maximum voltage rating of 250 (V), and what range of resistance values are limited by the maximum power of ½ (W)
An engineering statistician wants to conduct a test to determine if there is a difference in the compression strength of two different manufactures of reinforced concrete columns.
A coaxial cable connects a 50W transmitter to an antenna with a feed impedance of 200W. The operating frequency is 900MHz and the cable has a velocity factor of 0.66. Determine the characteristic impedance and length of the cable.
In a balanced three-phase system the Y-connected impedances are 3∠60°Ω. If V_bc=480∠-75° V, find current of phase "b" in polar form.
Signal Definitions are A.H, B.L ,C.L, D.H and Z.L. It is recommended you apply DeMorgan's Theorem first to the above equation. Draw (on paper) a circuit diagram implementing Z, using the minimum number of gates.
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