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A child places a wooden block on a longer horizontal plank of wood. She slowly tilts the plank until the instant the block begins to slide. As soon as the block begins to slide, she holds the plank in place. What is the magnitude of the acceleration of the block down the plank? ($$\mu_s = 0.5$$ and $$\mu_k = 0.2$$) $$0 m/s^2$$ $$2.6 m/s^2$$ $$3.2 m/s^2$$ $$7.9 m/s^2$$ $$9.8 m/s^2$$

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Practice Problem 1264-received at the end of a 3.nhase 20 km long.impedance is (5 + jl0) ohns. The voltage at theeceiving end is 11 kV. What would be the reduction inline loss if the power factor is improved to unity?A, 14.14 kWB. 32.32 kWC. 23.23 KWD, 41,41 kWPractice Problem I,265A short 3-phase, 3 wire line with an impedance of(6+j8) ohms per line has sending end and receiving endline voltages of 120 and 110 kV, respectively for areceiving end load at a power factor of 0.80 lagging thetotal power in MVW is nearest to,A. 96.01B. 9160C.91.06D. 96.10Practice Problem 1.266:what distance over which a load of 20,000kW at 0,80 power factor can be delivered by a 3-phaseline each conductor having a resistance of 0,92 ohms perkilometer. The load voltage is 132 kV between lines andthe transmission loss is 8% of the load.A, 48.2 km0.8 power factor lagging isB, 42.8 kmC. 46.3 kmD, 43,6 kmPractice Problem 1,267 :A3 phase transmission line has an impedance perphasefactor. wVhat is thenthe efficiency of transmission is 92%.A. 16.85 kVB. 16.69 kVC. 16.96 kVD, 16.58 kVPractice Problem L.268:What is the percent regulation of a 13.2 kV, 3-phaseline delivering 45 Amp current at 0.8 lagging powerfactor. The impedance per phase of the line is (4+j5)ohmsA. 3.66 9%B. 3,88 %C. 3.33 %D. 3.55 9%Practice Problem 1,269A. 11.63 kVB. I1.36kVng- -end voltage iphase of 0son ns an impedanceis 12.8 kV and at the receiving d the load takes 1,200end lKW and 60 Amp at agging power factor. What is theJoad voltage between lines?C, I1.58kVD. IL.85 kVnsmission havoltperPractice Problem 1,270 :A load of 10 MVA, 0.80impedance of (3 + jl0) ohms, The sending end voltagebetween lines is nearest to..A. 25,970VB. 25,790 VC. 25,709 VD. 25,907Practice Problem 1,271L:A 230 kV transmission line has an impedance of 6L 75\deg ohms. The sending end power is 100 MW at 230kV and 0,80 power factor the line loss isA. S84,68 kWB. 548.68 kWC.485.68 KWD. 458.68 kWPractice Problem 1,272:power factor r lagging 22A 3-phase 50 kn long single circuit 60 Hztransposed overhead line has horizontal spacing with 3meters between adjacent conductors. The conductor is 2cm. Find the total inductive reactance?A. 25.5 ohmsB. 27.7 ohmsC. 23.3 ohmsD. 22.2 ohms

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Comparing the t statistic with the critical t value(s), what is the hypothesis test result? Group of answer choices Reject the null hypothesis because the calculated t statistic is more extreme than the critical t value. Fail to reject the null hypothesis because the calculated t statistic is more extreme than the critical t value. Reject the null hypothesis because the calculated t statistic is less extreme than the critical t value. Fail to reject the null hypothesis because the calculated t statistic is less extreme than the critical t value.

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Consider the following reaction: Sulfonation of benzonitrile Part: 0 / 2 Part 1 of 2 List the reagent(s) needed for carrying out the sulfonation of benzonitrile. Use commas to separate reagents if necessary.

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The simple interest on an investment is directly proportional to the amount of the investment. An investment of $5500 earns $233.75 after 1 year. Find a mathematical model that gives the interest N after 1 year in terms of the amount invested P.

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27.0 In the PERMA model, positive emotion helps people become self-absorbed for long periods of time when they focus positively on themselves is limited to joy found in relationships outside the workplace, such as friends and family and perhaps goes beyond simple pleasurable emotions and captures feelings of deep satisfaction is limited to simple pleasurable emotions of temporary satisfaction

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10. Marie Jahoda's interdisciplinary collaborations included working with: A) Sociologists on community studies B) Neuroscientists on brain imaging research C) Economists on behavioral economics research D) Anthropologists on cross-cultural studies

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suppose the pressure 6.8 m deep in a lake of fresh water is 143,649 Pa. Calculate the atmospheric pressure at the surface of the lake

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Question 2 The assets (in billions of dollars) for a financial firm can be approximated by the function $A(x) = 308e^{0.074x}$, where $x = 7$ corresponds to the year 2007. Find the assets in 2016. Round to the nearest tenth in result.

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The Dakota Corporation had a 2023 taxable income of $18,000,000 from operations after all operating costs but before (1) interest charges of $3,600,000, all of which is tax deductible; (2) dividends received of $300,000, (3) dividends paid of $2,100,000, and (4) income taxes (the firm’s tax rate is 21 percent).

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tammy s.