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A U.S Department of Energy report estimates that over 100billion kWH/year can be saved in the United States by variousenergy conservation techniques applied to the pump-driven systems. Calculate:a) how many 1000-MW generating plants running constantly supply this wasted energy.b) the annual savings in dollars if the cost of electricity is0.10 $ /kwH
A certain 12V dry-cell battery, completly discharged, requires a current of 100mA for 1 hour to completely recharge. What is the energy storage capacity of the battery (in kJ), assuming the voltage does not depend on its chage status.
A MOSFET is used in a boost-buck converter. The on-state loss is 4.2 W, and the switching loss is 2.8 W. The device is in TO-220 heat-sink package. it is desired to avoid a heat sink, and a parallel connection has been suggested.
The frequencies of the tones are 100 Hz, 300 Hz, and 450 Hz. The sampling rate is 1 kHz. Describe a low pass, a band pass, and a high pass filter that could be used to detect the individual tones.
Two particles are fixed to an x axis: particle 1 of charge q1 = 2.32 x 10-8 C at x = 27.6 cm and particle 2 of charge q2 = -5.98q1 at x = 60.4 cm. At what coordinate on the x axis is the electric field produced by the particles equal to zero
An electronics manufacturer makes corrosion-resisitant, gold-plated connectors. Each connector is cylindrical in shape with a diameter of .100 cm and a length of 1.0 cm. Each connector is to be coated with a 10 -(micrometer) gold layer.
A DC series generator is supplying a current of 5A to a series lighting system through a feeder of a total resistance 10 ohms.The terminal voltage is 2500V and the armature series field resistance 18 ohms and 15 ohms respectively.
A capacitor bank is required that can be charged to 5 kV and store at least 250 K of energy. Design a series/parallel combination that meets the voltage and energy requirements using 20-μF capacitors each rated at 2 kV max.
A transmission line is specified by the following, while operated at omega w=6*10^8 rad/s, L'= 0.4*10^-6 H/m, C'=40*10^-12 F/m, G'=80*10^-6 S/m, and R'=20 ohms/m. Find the attenuation rate after a wave propagates 10 meters on this line.
A particle travels along the x-axis with postion ( measured in meters ) as a function of time ( measured in seconds ): x(t) = 5t^2-7t+2. (a) At what time or times is the particle at rest
An AM modulator operates with the message signal: m(t) = 9 cos(20πt) - 8 cos(60πt). The unmodulated carrier is given by 110 cos(200πt), and the system operates with an index of 1/2. a. Write the equation for mn(t), the normalized signal with a mini..
design a propotional controller for a system with the transfer function G(z)=K/(z-0.4) to have a damping ratio of 0.7
Design a current divider that provides a 1:2 current split. Observe the current and power limitations as in the previous item. Another design constraint is that inserting current meters to measure the current division ratio must not upset this rat..
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