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A particular load has a pf of 0.8 lagging. The power deliveredto the load is 40 kW from a 270-V rms 60-Hz line. What value ofcapacitance placed in parallel with the load will raise the pf to0.9 lagging?show how the quadrature relation affectsthis process and provide steps through thesolution?
1.How is crude oil formed ?How is it found/discovered ? 2.How is natural gas formed? (Start with plankton) and include crude oil formation.
design a multirange ammeter with ranges of 1-10mA,0-100mA, and 0-1500mA, using a 5mA movement whose internal resistance is 3.8ohms. draw a circuit diagram of the meter.
What is the election current in a 2 mm diameter copper wire if the electron drift speed is 1 x 10^-4 m/s. express in coloumbs per second and amperes
Calculate the tetrahedral bond angle, the angle between any pair of the four bonds in a diamond lattice. (Hint: represent the four bonds as vectors of equal length. What must the sum of the four vectors equal
design a regulated poewr supply with these specs Output a dc voltage of 10 V Load Variation: 0.3 -10000ohms Ripple Factor: less 0.1% for 2000ohms load
Given the excitations x[n] and the impulse responses h[n], find closed form expressions for and graph the system responses y[n] x[n] = u[n], h[n]=(4/7)δ[n]-(-3/4)nu[n]
Suppose that independent missiles A, B, C have probabilities .4, .5, and .6 of hitting the enemy's headquarters, respectively. Assume that the enemy's headquarters will be destroyed with a probability .3,
Design a digital notch filter of the form H(z) = (1+cz-1+dz-2)/ (1+az-1+bz-2), which has a notch at fo = 60 Hz and a 3-dB width of Δf = 20 Hz. The sampling frequency fs = 8 KHz. Determine a, b, c and d.
Your program should be efficient in the use of memory and computational complexity.
There are a number of factors and precautions that need to be considered when developing and introducing new technologies to the marketplace. This is especially the case when this could be a technology without a sustainable known history.
A 500kVA ,7200-240V, 60Hz, transformer with 2.2% impedance was severly damaged as a result of a dead short across secondary terminals. Determine a) The short-circuit current;
Adding dopants to a sample of silicon is found to reduce the Hall coefficient by a factor of 10 and increase the conductivity by a factor of 5. What effect has this dopant addition had on the mean free path
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