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What is the average yearly per capita energy consumption in the world in kWh if the global power is 15 TW. There are 8760 hours in a year and 6.5 billion people. Express the result as number only wi
How many kg of coal with energy content of 24 MJ/kg would be equivalent to energy used by a 100-W light bulb burning constantly for the whole year. Coal to electricity conversion efficiency is 30%.
x[n]=cos(n*7pi/16)+cos(n*9*pi/16) a)Find the FS coefficients of x[n]. b)Obtain the DTFT of x[n] using the coefficients. c) Use Matlab, compute 25 seconds of the discrete-time signal x[n] using a
Use contraction beginning with a 4-bit adder with carry out to design a 4-bit increment-by-2 circuit with carry out that adds the binary value of 0010 to its 4-bit input. The function to be implemen
The battery is made by connecting 5 unit cells in series and then by connecting 6 of these series cells in parallel. Each unit cell has the voltage of 1.25 V and the internal resistance if 2.2 Ohm.
A 50 V DC power supply is connected to a 100 Ohm load resistor. The tested current flowing through the resistor is 0.49 A. find the internal resistance of the DC power suppy.
An Internet service provider has three different subscription packages for its customers: Package A: For $9.95 per month 10 hours of access are provided. Additional hours are $2.00 per hour.&nbs
Two identical 138 kV Y: 13.8 kV DELTA 100 MVA tap changing transformer each with a per unit series impedance of j.1 ohms are operating in parallel and supplying a 180 MVA load at 13.8 kV and .8 lagg
A 120-V source is to be connected to a load by two copper wires. The load is located 500 feet from the source. The maximum voltage drop due to the wire resistance is 10 V, which makes the minimum lo
The donor concentration in a silicon sample at 300K is ND = 1.2 x 1015 cm-3. 1 x 1016 cm-3 acceptor atoms are added to form a compensated p-type semiconductor so that the Fermi level is 0.26 eV abov
The sun radiates a total power of about 2 × 1026 watts (W). If we imagine the sun's surface to be marked off in latitude and longitude and assume uniform radiation, (a) what power is radiated
Design an amplifier to sense open-circuit output voltage from a transducer and provide proportional current through a load resistor. The series resistance of the transducer is a range between 1 kOhm
The hole concentration in p-type GaAs is given by p=10^16 (1-x/L)/cm^3 for 0<=x<=10um. The hole diffusion coefficients 10 cm^2/s. Calculate the hole diffusion current density at x=5um.
The following test data were obtained from short-circuit and open circuit tests of a 5-kVA, 2400-600V, 60Hz transformer. Voc=600V Ioc=3.34A Poc=484W Vsc=76.4V Isc=20.8A Psc=754W
The transformer is to be used on a 50 Hz system, with the restriction that it maintain the same maximum core flux and the same total losses. Determine (a) the new voltage rating; (b)the new kVA rati
A 37.5-kVA, 6900-230V, 60Hz, single phase transformer is operating in the step down mode at rated load, rated voltage, and 0.68 power factor lagging. The equivalent resistance and reactance referred
The transformer is operating in the step-down mode. Sketch the appropriate equivalent circuit and determine (a) the equivalent low-side parameters; (b)the no-load voltage; (c)the voltage regulation
The transformer is supplying a load that draws rated current at 480V and 75 percent power-factor lagging. Sketch the appropriate equivalent circuit and determine (a) the equivalent resistance and eq
signal s(t)= (2a) / (t2+a2) A) Determine the essential bandwidth B Hz of s(t) such that the energy contained in the spectral components of s(t) of frequency below B Hz is 99% of the signal energy.
where R is the resistance at temperature T(measured in C), R0 is the resistance at T = 0 C and α is a temperature coefficient. For copper, α = 4 * 10-3 C-1 . At what temperature is the
Write a switch statement to print out "Odd" or "Even" for each integer that is typed on the keyboard depending on whether the integer is odd or even. Only integers from 0 to 9 can be typed on the ke
When room temperature exceeds approximately 82 degrees Fahrenheit, turn on a red LED. Use a PNP transistor to turn on one LED and an NPN transistor to turn on the other LED. Wire the LED's as parrel
The four alkaline battery cells store a total of 200watt-seconds of energy. If the cassette player is drawing a constant 10mA from the battery pack, how long will the cassette operate at normal powe
Measurments taken of a square-wave signal using a frequency-selective voltmeter(called a spectrum analyzer) show its spectrum to contain adjacent components(spectral lines) at 98KHz and 126 KHz of a
The following calculation was performed by a particular breed of exceptionally intelligent cartoon character. If the radix r used by the character corresponds to its total number of toes, how many t