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WEEK NINE: DISCUSSION QUESTIONS
1. Are all three wilderness/nature models correct? Can one hold more than one? Which do you hold, and why?
2. Are these cultural models necessary? Is it possible to have a purely "scientific" understanding of nature?
3. Is it possible to determine the original pure state of nature for reasons of preservation? Why or why not? Explain.
A standard D cell flashlight battery is connected to a load of 3 Ω. After 6 hr of intermittent use the load voltage drops from an initial 1.5 V to a final useful voltage of 0.9 V.
find the output powers (in dBm) at the through, coupled, and isolated ports.
A 24-volt automotive battery is connected to two headlights, such that the two loads are in parallel; each of the head lights isintended to be a 75-W load, however, a 100-W headlight is mistakenly installed.
A bus arrives at a bus stop at a randomly selected time within a 1-hour period. A passenger arrives at the bus stop at a randomly selected time within the same hour
An emitter-follower circuit is built using an npn transistor with ß=100 and with RE =1k-ohm. What is the input impedance of the open circuit. If a load of 100-ohm is connected to the output of the circuit, what is the input impedance
Assume we need to design a cellular system that covers an areaof Radius R=20 miles.For practical reasons (cost of BS , handoffcapability,etc.) ,each cell should cover at least an area of radiusr=1 mile.FDD is used and that each simplex channel re..
Determine the dc voltages, VB, VE, and VC, with respect to ground in Figure 3-74. Determine the voltage gain for the CE amplifier in Figure 3-74. Determine IC(sat) for Q1 and Q2 in Figure 3-43.
Consider a 3 phase, 2 pole induction machine. Neglect the stator windings resistance and the leakage inductance. The rated voltage is 208 V (line-line, rms) at 60 Hz. Lm=60 mH, and the peak flux density in the air gap is 0.85T.
The length of time to failure (in hundreds of hours) for a transistor is a random variable Y with cumulative distribution function given by the following: F(y)-e-y^2 for y >- greater than or equal to 0. a. Find the pdf of y.
Given the sum of products: F = (A'BFG) + (AB'CD) + (BD'FG) + (ACDE') Create an all NAND gate realization of the circuit. Use boolean manipulation to arrive at the minimum number of chips needed. Then repeat only this time using all NOR gates.
Six input voltage sources (V1, V2, V3, V4, V5, V6) have a +/- 1 V range. Design a circuit to produce Vout as the most negative (smallest) of (V1 + 2V2), (V3 - 2V4), (-V5 - 2V6). Your design should specify exact components. Note that diode drop can..
What is the (approximate) maximum electric field intensity for which constant mobility may be assumed for electrons in silicon. In a digital circuit with a supply voltage of 1V, what is the corresponding gate length for MOS transistors.
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