XProblem No.3 (P3). An emitter bias NPN BJT with Ib= 20 microAmp, Rc= 2.7KOhms and Re= 0.68 kOhms. The Emitter Voltage (Ve) = 2.1. Determine the Base Resistor (Rb). a. 474 Ohms b. 747 milliohms O c. 747000 Ohms O d. 4.74 MegaOhms

F2 * Please use the accompanying Excel data set or accompanying Text file data set when completing the following exercise. An article in the ASCE Journal of Energy Engineering ("Overview of Reservoir Release Improvements at 20 TVA Dams," Vol. 125, April 1999, pp. 1-17) presents data on dissolved oxygen concentration from streams below 20 dams in the Tennessee Valley Authority system. The sample mean from the observations is X 3.272 and the sample standard deviation is s = 2.130. Assume population is approximately normally distributed. Round your answers to 2 decimal places. = (a) Calculate the 95% two-sided confidence interval on the mean oxygen concentration. 2.29 i -1.2736 SUS 4.28 (b) Calculate the 95% two-sided prediction interval on the dissolved oxygen concentration for the next stream that will be tested. (i -3.6752 7.8456 (c) Find an interval that will contain 95% of the values of the dissolved oxygen concentration with 99% confidence. @ 3 # 80 F3 000 F4 $ 4 i 10.2472 75 %…

9. What is the purpose of combustion devices (burners) for burning solid fuels in powder form? transportation of fuel from the coal bunkers to the combustion chamber; O to dry the fuel in the coal preparation systems O crushing of solid fuels into powder with the necessary grain size for the combustion processon O to supply to the furnace the fuel mixture and the air necessary for combustion

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