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The temperature of water in a 25 gallon water heater is supposed to be raised from 60 deg F to 125 deg F. Compare the cost of using electricity and natural gas to heat the water. The following information is useful:1 gal of water = 8.35 poundsPrice of electricity = $.0866/kWhPrice of natural gas= $.74608/ therm1 therm = 100,000 BTU
Assuming that only integer multiples of a unit bipolar transistor having IS = 3 x 10-16A can be placed in parallel, and only a single voltage source, VB, is available (Fig. 4.54), construct the required circuit with minimum number of unit transist..
Design a second-order band-pass filter for a system with sampling frequency of 18 kHz that is tuned for f=5kHZ The filter should not have any sample delay (the numerator and denominator orders are equal)
Sam (75 ) takes off up a 50--high, 10 frictionless slope on his jet-powered skis. The skis have a thrust of 200 . He keeps his skis tilted at 10 after becoming airborne. How far does Sam land from the base of the cliff
The messages being sent are 2 milliseconds long. Computer A starts sending a message on the bus; 250 microseconds later, Computer B starts to send a message, and 250 microseconds after that, Computer C starts to send a message.
b) Calculate the armature current at start c) The motor is now used as a generator. Calculate the speed of the machine if the armature current is 80A and there is a 230V at the motor's terminals. Assume a constant flux.
Point A is at an electrostatic potential of +1V relative to point B in a vacumm. An electron initially at rest at B moves to A. What energy (in J and eV) does the electron have at A What is its velocity
The network is used for voice communications. Is it possible for one mobile unit to connect to another mobile unit directly? What advantage is there in connecting through the hub?
A sinusoidal voltage wave of real amplitude B0, and frequency w, and phase constant B, propogate in the forward z direction toward the shorted load end in a lossless transmission line of characteristic impedance Z0.
Design your circuit so that the STOP push button must be pressed before the motor can be switched direction Also incorporated a 5 second delay to inhibit restart after the STOP push button has been pressed Green light
An n-channel MOSFET has a thershold voltage (Vt) of 0.5 V and a width to length ratio (W/L) of 2. If the tansistor generator the curve bleow when the gate to source voltage (VGS) is 1.5V. I D = 0.12mA. VDS = 0.5 V.
A sequential circuit with two D flip flops, two inputs x and y, and one output z is specified by the following next state and output equations: A(t + 1) = xy + x'B B(t + 1) = y'A' + yB
Electricity is distributed from electrical substations to neighborhoods at 15,000 Volts, to a transformer on utility poles near homes, where is it stepped down to 120 Volts for household use.
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