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A car with a projected frontal area of 1.8 m^2 is traveling at 136 KPH. If the drag coefficient of the car is 0.45 and the air density is 1.23 kg/m^3, find the total aerodynamic drag force on the car, and the power required to overcome this drag force.
Determine the energy uses on farms in middle east and determine whether or not it is better to use a stand alone system or a grid connected system for the application on farms.
the N-type P-type doping levels of a silicon p-n junction are nd=na= 5x10^16 cm^-3 caltulate the built in voltage Vbi a) at a room temperture b) at 300c c) at 700 c (ni= 1.10x1018 cm^-3) does a negative value for Vbi mean anything
Three single-phase two-winding transformers, each rated 25 MVA, 34.5/13.8 kV, are connected to form a three-phase bank. Balance positive-sequence voltages are applied the high voltage terminals, and a balanced, resistive Y load connected
Three loads 3+4j are connected in delta to a 208-V, three phase line find line current, power factor, real power, reactive power and complex power
Power Systems Theory Definitions and Formulas, Define, (a) The fault level of a system or unit in a system, (b) base MVA
design a new p-type semiconductor material. Acceptor density is Na=5x1015 cm^-3 and there are no donors are present in the material. The effective densities of states for this material is given as Nv=1.8x10^19cm^-3
A dc series motor of 230 V, 12 hp, 1200 rpm is connected to a 230 V supply. It draws a current of 40 A, and rotates at 1200 rpm. Ra = 0.25 ohms and Rs = 0.1 ohms. Assume magnetic linearity.
A very long cylinder of radius 2.00 cm carries a uniform charge density of 1.50 nC/m. Taking the reference level for the zero of potential to be the surface of the cylinder, find the radius of equipotential surfaces having potentials of 10.0V, 20...
a) If m1 and m2 are minterms of n variables, prove that m1 OR m2 = m1 XOR m2 b) Prove that any switching function can be written as the exclusive-OR sum of the products where each product does not contain a complemented literal.
a) Construct a choice table for interest rates from 0% to 100%. b) Which roof should you choose if your MARR is 12% what is the actual value of the IRR on the incremental cost?
An office building of 20,000 ft2 would then take 40,000 watts of lighting at 2 watts /ft2. which amounted to 667 - 60 watt light bulbs or about the same two-bulb fluorescent fixtures. Resize the lighting system (W) assuming a lighting level.
A negative feedback amplifier has a close-loop gain Af=100 and an open-loop gain A=105. What is the feedback factor If a manufacturing error results in a reduction of A to 103, what close-loop gain results
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