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"Food survey data all wrong?" This was the headline of a newspaper article on a report from the from the General Accounting Office of the U.S. Government related to the Nationwide Food Consumption Survey. The survey of 6,000 household of all incomes and 3,600 low-income households is intended to be the leading authority on who consumes what foods. Even though the original household were randomly selected, the GAO said the result were questionable because only 34% of the sampled household responded. Do you agree? What is the nature of the biases that could be caused by the low response rate? (The article was printed in the Gainesville Sun, September 11, 1991)
Think of an example of misfit caused by an inappropriate organization design. Explain how a firm's structure could systematically increase its costs and place it at a strategic disadvantage.
Sketch the phasor diagrams for the following waveforms: v1 = 80sin(pi*t + 35°)(a) What is the phase difference between v1 and v2 (b) Determine which voltage leads and which lags.
Question about Complex power, If an electrical load operates at 240 Vrms.The load absorbs an average power of 8kW with .8 lagging power factor
A full wave rectifier has 50 Hz input signal, a peak voltage output VM of 12 V, and an output load resistance of R=10 kOhm. If ripple voltage is to be limited to Vr=0.2 V , determine the required capacitance value.
Consider two discrete sequences: x = [7.7, 5.2, 2.2] y = [1.0, 9.3, 3.1] Let z be the convolution of x and y. What is the 4th non-zero value of z (from the left)
a load of 300 kw is driven by a 3-phase motor of 0.9 efficiency. the motor has a power factor of 0.7 lagging and is
Design a circuit that takes the output from each of the five microphones your band uses and adds the voltage to create a single voltage signal which is fed to the amplifer. Except not all voltages should be equaly amplified.
Calculate the earth loop impedance, minimum fault current (neglect the supply/earth impedance) and select an appropriate fuse for the circuit with reference.
Sketch a transistor-level schematic of F=(A+BC+DE)' and determine the relative sizing of all the transistors to equalize the rise/fall time.
Calculate the value of the energy stored when a current of 50 mA is flowing in a coil of inductance 200 mH. What value of current would double the energy stored?
Compare energy cost reductions based upon a gas fired boiler and a fuel oil fired boiler. Assume boiler energy input at 6.5(106) Btu/hr.
Explain the conditions of diode in forward and reverse biased?
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