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American and European bricks-and-mortar retailing is increasingly becoming dominated by "hypermarts," enormous stores that sell groceries, household goods, hardware, and other products under one roof. What are the possible economies of scale that might be enjoyed by hypermarts? What are the potential diseconomies of scale? How can hypermarts fend off competition from web-based retailing?
How to calculate the minimum sampling frequency to guarantee x bits of signal to alias ratio for a certain range of frequencies [a, b], knowing that you have a low pass (anti-aliasing) filtered signal at f= y kHz
Two coils wound on a common core have L1 = 0.2 H, L2 = 0.5 H, and M = 0.1 H. The currents are i1 = exp( -1000t) A and i2 = 2 exp( -1000t) A. Both of the currents enter dotted terminals. Find expressions for the voltages across the coils.
Sketch the electric field intensity of this arrangement using field lines.
A coaxial line consists of inner and outer conductors made of copper and having radii of a = 0.65 mm and b = 2.75 mm. The space between the conductors is filled with polyethylene (er=2.25). Find the characteristic impedance Z0
1 for the circuit below given r1100omega r2100omega and l5muh. a derive the expression for transfer function hf.b
The power transferred across the air gap of a two-pole induction motor is 24kW. If the electromagnetic power developed is 22kW, find the slip. Calculate the output torque, if the rotational loss at this slip is 400W
Design a counter that counts pulses on line 'w' and displays the count in the sequence 0,1,3,2,0,1,3,2,0,1. Use D flip-flops in the circuit.
A 240kW 500V 1750 r/min separately excited dc generator has an overall efiiciency of 94%. The shunt field resistance is 60 ohms and the rated current is 5A. The I^2 R loss in the armature is 0.023 pu.
1) Compute the average power dissipated through the resistor 2) compute RMS voltage across the resistor 3) compute V RMS^2/R. 4) prove that P avr=V RMS62/R for any periodic voltage waveform
Explain how to find a causal, stable LTI system with rational Laplace transform G(s), such that, at least,the magnitude frequency response of H(s) is inverted; i.e.,|G(jω)| = |H(jω)-1|. Hint First show that H(s) can befactored into a series combin..
(a) Design a full subtractor cicuit with three inouts x, y,Bin, and two outputs D and Bout. The circuit subtracts x - y - Bin.Bout is 0 if no borrow is needed to complete the subtraction, and 1if a borrow is needed.
A beam has a solid square cross section of 100mm and is simply supported by two supports 3m apart. Calculate the dead load that can be safely supported when applied to the middle of the beam. Assuming material of the beam is mild steel.
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