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Consider the following 3NF relations about a sorority or fraternity:
a. Foreign keys are not indicated in these relations. Decide which attributes are foreign keys and justify your decisions.
b. Draw an E-R diagram for these relations, using your answer to part a.
c. Explain the assumptions you made about cardinalities in your answer to part b. Explain why it is said that the E-R data model is more expressive or more semantically rich than the relational data model.
Specifications of an analog filter are given below: Butterworth highpass filter Absolute passband gain=1 3-dB cutoff frequency at 4000 radians/second 40 dB attenuation at the stop frequency of 800 radians/second
A parallel circuit contains an AC voltage source of 3 Vrms, 100 Hz. The output of the voltage source is connected to a diode (1N4004). After the diode, connected in parallel are a 0.1uF capacitor and a 100 kohm resistor.
Important information about Electrical Networks, Engine consumes 5kw of power and a reactive power of 2kvar at current of (3+j2) Amps.
If the thickness of gate oxide for a MOS transistor is about 100A, about how many SiO2 molecules, on average, are stacked on top of each other to form the gate oxide
Suppose that a regular RS code is designed to operate with blocks whose individual symbols are four bits long (so b = 4).
Suppose the circuit is designed for a nominal gain of 2.00 but the R1 and R2 suffer from a mismatch of 5% (i.e., R1 = (1 ±0:05) R2). What is the actual voltage gain?
Identify three types of electrical or electronic components currently used in business or industry today that use voltage regulators in their operation. Discuss some of the problems that can be experienced if the input voltage to the electroni..
Design a system using the photoconductive cell in Figure to measure and display light intensity. Make the design such that 20 to produces an output of 0.2 to 1.0 V. What is the readout error when the intensity is 60 mWcm2?
generate a bounce diagram for the voltage vz t for a i-m-iong lossless line characterized by zo 50 ohm and up 2c3
A given signal f(t) is multiplied by this periodic signal. Determine an expression describing the spectrum and the time waveform of the resulting amplitude-modulated signal if all componets except those centered at + Wc
The input signal to a filter contains components that range in frequency from 100 Hz to 50 kHz. We wish to reduce the amplitude of the 50-kHz component by a fctor of 200 by passing the signal through a first-order lowpass filter.
Straight rods of 6-mm diameter and 30-m length are stored by coiling the rods inside a drum of 1.25-m inside diameter. Assuming that the yield strength is not exceeded
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