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An aluminum casting that weighs 10 lb is resting on a steel surface.
a. How much force will be necessary to get it started sliding?
b. How much force will be necessary to keep it sliding once it is moving?
Measurements show that for a particular arrangement of the equipment and at a particular amplifier setting, the system will howl if 1% of the output power is fed back to the microphone. Estimate the power gain of the P.A. amplifier in decibels.
A car's radio may be subjected to voltage spikes induced by coupling from the ignition system. Pulses on the order of ±250 V and lasting for 120 µs may exist. Design a clipper circuit using resistors, diodes, and Zener diodes to limit the input vo..
The potentiometer is designed to rotate 330 degrees to give the full range of possible resistance. However, the actual measurement range that is used is only 165 degrees indicating positions of a liquid sensor float ranging from 0 to 10 cm (empty ..
A load has a 20 ohm resistor and a 4 Henry inductor connected in series. It is connected to a power source with v(t) = 100 cos(50t), connected in series to the load. What is the impedance of the load? Use phasor transform methods to obtain your an..
Calculate capacitor size, An electrical supply company charges its consumers a penalty if their reactive energy consumption (Kvar-hour)exceeds half their true energy consumption (Kilowatt-hour).
Develop the pseudo-code below for a program that will retrieve 2 bytes (NUM1 and NUM2) from memory, determine which is closest to the numeric value 50, and indicate the result by setting a variable named "CLOSEST" to 1 (if 1st byte is closest) or ..
Supposed that the signal y(t) is low -pass filtered. The magnitud od the low pass filter is unity and the cut off frequency is Rz= 5000*pi rad/sec. Determine the value of the sampling period Ts according to the given information.
What is the power level entering the first active stage of the receiver at 1900 MHz being fed by a 25 meter coax with a loss of 20 dB/km, given that the Isotropic Receive Level is -134 dBW and the receiving station has a 1 meter radius dish
What is the approximate discrete-time equation the models the continuous-time impulse response for fs=1kSa/s and RC=10^-2?How to solve this problem?
The field circuit has a dc voltage of 200 V, and the maximum IF is 10 A. The open-circuit characteristic of this motor is shown in Figure. Answer the following questions about the motor, assuming that it is being supplied by an infinite bu..
Machine A was purchased three years ago for $10,000 and had an estimated market value of $1,700 at the end of its 10-year life. Annual operating costs are $1,350. The machine will perform satisfactorily for the next seven years.
Design a lighting system along with electrical power distribution - Using CIBSE guides and Building Regulations Approved Documents as references, design a lighting system along with electrical power distribution.
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