Numerade

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Consider the following reactions: $$2SO_2(g) + O_2(g) \rightarrow 2SO_3(g) \quad \Delta H^\circ = -196 \text{ kJ}$$ $$2S(s) + 3O_2(g) \rightarrow 2SO_3(g) \quad \Delta H^\circ = -790 \text{ kJ}$$ Based on these data, what is the heat of formation of $SO_2$? +395 kJ +202 kJ -297 kJ -398 kJ -594 kJ

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How many joules are in 1200.0 calories (1 cal = 4.184 J)? a) 3.3x 10-4 J b) 3.5 x 10-3 J c) 2.0 x 10-4 J d) 5,021 J e) 6.02 x 106 J

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c. Both a and b d. Neither a nor b Question 5 5. Which of the following applies to some local Buddhist communities? a. Some are very closely-knit ethnic communities. b. These ethnic communities frequently shun wider public attention. c. Some Buddhist communities are primarily connected to a particular country of origin, such as Korea, Japan, Laos, or Thailand. d. All of the above. 4 pts

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3.10 The following table gives capital costs and variable costs for a coal plant, a natural gas combined-cycle plant, and a natural-gas-fired gas turbine: able[[,COAL,NG CC,NG GT],[Capital Cost (($)/(k)W),$1,500.00,$1,000.00,$500.00 a natural gas combined-cycle plant, and a natural-gas-fired gas turbine: COAL NG CC NG GT Capital Cost ($/kW) Variable Cost (c/kWh) $ 1,500.00 2.50 $ 1,000.00 4.00 $ 500.00 8.00 The utility uses a fixed charge rate of 0.10/yr for capital costs. Its load duration curve is shown as follows. 8000 7000 6000 5000 DEMAND (MW) 4000 3000 2000 1000 0 0 1000 2000 3000 4000 5000 6000 7000 8000 HRS/YR Figure P3.10 a. Draw the screening curves (Revenue Required $/yr-kW vs hr/yr for each of the three types of power plants. b. For a least-cost combination of power plants, how many MW of each kind of power plant should the utility have? If you plot this carefully, you can do it graphically. Otherwise you may need to solve algebraically c. Estimate the average capacity factor for each type of power plant. d. How many MWhr of electricity would each type of power plant generate each year?

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Find the area of the region between the curves $y = 6x^2 - 6$ and $y = -x^2 + 1$ from $x = -1$ to $x = 1$. The area is (Simplify your answer. Type an integer or a fraction.)

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Let us consider the Turing machine M? = ({S0, S1, S2, S3, S4, S5}, {0, 1, 2}, {0, 1, 2, x, y, z, \textvisiblespace}, d, s0), with the following transition function represented as a table: d\\ 0\\ 1\\ 2\\ x\\ y\\ z\\ -\\ S0\\ (S1, x, R)\\ Æ\\ Æ\\ Æ\\ (S4, y, R)\\ Æ\\ Æ\\ S1\\ (S1, 0, R)\\ (S2, y, R)\\ Æ\\ Æ\\ (S1, y, R)\\ Æ\\ Æ\\ S2\\ Æ\\ (S2, 1, R)\\ (S3, z, L)\\ Æ\\ Æ\\ (S2, z, R)\\ Æ\\ S3\\ (S3, 0, L)\\ (S3, 1, L)\\ Æ\\ (S0, x, R)\\ (S3, y, L)\\ (S3, z, L)\\ Æ\\ S4\\ Æ\\ Æ\\ Æ\\ Æ\\ (S4, y, R)\\ (S4, z, R)\\ (h_a, -, R)\\ 1. Show that 001122 is accepted by M?. Describe the step-by-step transitions of the Turing machine when accepting this string;\\ 2. What is L(M?)?

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3:04 PM 48% A standard electric motor is rated at 10 horsepower (HP) and costs $800. Its full-load efficiency is specified to be 92%. A newly designed, high-efficiency motor of the same size has an efficiency of 95% but costs $1,200. It is estimated that the motors will operate at a rated 10-HP output for 2,000 hours a year, and the cost of energy will be $0.07 per kilowatt-hour. Each motor is expected to have a 12-year life. At the end of 12 years, the first motor will have a salvage value of $50, and the second motor will have a salvage value of $100. Consider the MARR to be 8%. (Note: 1HP = 0.7457 KW) Un motor elÃ©ctrico estÃ¡ndar de 10 hp cuesta $800. Su eficiencia de carga estÃ¡ especificada en 92%. Un motor de eficiencia alta de 10 hp tiene una eficiencia de 95% pero cuesta $1,200. Se estima que los motores operarÃ¡n por 2,000 horas por aÃ±o y que el costo de energÃa serÃ¡ $0.07 por kilowatt-hora. Cada motor durarÃ¡ 12 aÃ±os. Al final de 12 aÃ±os, el primer motor tendrÃ¡ un valor residual de $50 y el segundo motor tendrÃ¡ un valor residual de $100. Considere un MARR de 8%. (Nota: 1hp = 0.7457 Kw) What is the annual energy cost for the standard electric motor (understand the following answers as negative values)? Â¿CuÃ¡l es el costo anual de energÃa para el motor estÃ¡ndar elÃ©ctrico (entienda las siguientes contestaciones como valores negativos)? $1,135 $1,160 $1,132 $1,106

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6/46 The 10° wedge is driven under the spring-loaded wheel whose supporting strut C is fixed. Determine the minimum coefficient of static friction $\mu_s$ for which the wedge will remain in place. Neglect all friction associated with the wheel.

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For the circuit shown in the figure below, a transformer of 230V/12V-0-12V is used and all diodes are Ge. The following values are given: R=3.3k. The name of the circuit is unknown. The current through the load is unknown. The DC output voltage is unknown. The input and output waveforms are unknown.

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30 +Vcc +12 V R1 33 k? Rc 2.0 k? Silicon 2N3904 B = 200 5mVrms f=1kHz R2 6.8 k? RB 470 ? P0max = 25mW Find: 1. IE 2. VCE 3. PD 4. V0 5. AV 6. AI 7. Ap 8. sketch Vin v/s t 9. Sketch V0 v/s t

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jeremy e.