為什麼[A(org)]=n[An(org)]成立 (第三張圖equation 7.9) 感謝

Experiment 7 Experiment 7 The partition of Organic acid between Water and Organic solvent Objectives Understand the partition of a solute between two immiscible solvents. Introduction A chemical analysis that is performed primarily with the aid of volumetric glassware (e.g., pipets, burets, volumetric flasks) is called a volumetric analysis. For a volumetric analysis procedure, a known quantity or a carefully measured amount of one substance reacts with a to-be-determined amount of another substance with the reaction occurring in aqueous solution. The volumes of all solutions are carefully measured with volumetric glassware. The known amount of the substance for an analysis is generally measured and available in two ways: 1. As a primary standard: An accurate mass (and thus, moles) of a solid substance is measured on a balance, dissolved in water, and then reacted with the substance being analyzed. 2. As a standard solution: A measured number of moles of substance is present in a measured volume of solution - a solution of known concentration, generally expressed as the molar concentration (or molarity) of the substance. A measured volume of the standard solution then reacts with the substance being analyzed. The reaction of the known substance with the substance to be analyzed, occurring in aqueous solution, is generally conducted by a titration procedure. The titration procedure required a buret to dispense a liquid, called the titrant, into a flask containing the analyte. A reaction is complete when stoichiometric amounts of the reacting substances are combined. In a titration this is the stoichiometric point. In this experiment the stoichiometric point for the acid-base titration is detected using a phenolphthalein indicator. Phenolphthalein is colorless in an acidic solution but pink in a basic solution. The point in the titration at which the phenolphthalein changes color is called the endpoint of the indicator. Indicators are selected so that the stoichiometric point in the titration coincides (at approximately the same pH) with the endpoint of the indicator.

以下是心統的題幹和問題 想請問這題要如何計算？ 謝謝！

3. David challenge you to play coin toss game. If you win, he will give you $10. If he wins, you will give him $5. He tells you the coin is fair. 大衛找你玩丟銅板遊戲,如果你赢一次可以拿到 10 元,如果 他贏一次要給他5元。他說銅板沒有動手腳。

以下是心統的題幹 想請問第c題算出來是6.88是要回答6還是7位？

2. Suppose the average height of all distribution is normal. 假設 students is 165 cm. The standard deviation is 10. The 學生的身高平均為 165 cm,標準差為10,呈現常態分配。

以下是心統的題幹與問題 想請問第以下兩題是否有計算錯誤？

1. Any of you who have listened to children tell stories will recognize that, unlike adults, they tend to recall stories as a sequence of actions rather than as an overall plot. Their descriptions of a movie are filled with the phrase "and then...." An experimenter with supreme patience asked 50 children to tell her about a given movie. Among other variables, she counted the number of "and then..." statements, which is the dependent variable. The data follow: 18 15 22 19 18 17 18 20 17 12 16 16 17 21 23 18 20 21 20 20 15 18 17 19 20 23 22 10 17 19 19 21 20 18 18 24 11 19 31 16 17 15 19 20 18 18 40 18 19 16 簡單翻譯:心理學家請小孩描述電影情節,並記錄他們使用「然後」的次數,50 位小孩的次數 如上。

深綠色箭頭為什麼那邊要用Re1不能用Rπ 淺綠色螢光筆框框處為什麼有負號

如圖所示的三級串接負回授结 構,已知Emiz=100mA/V, ign = 20 mA/V, h% = 100 台 「如,試求其迴路增益。 [4] =r=h g = 100 100=1kQr₁ = h 電子學第四冊 IV V=0 A₁B₁ = 例題 14-8 =-Bz2 關於迴路增益 AA 測試,其相關電路 關閉信號源 其中,因Q 共射放大器為單向,該處的輸入電阻與其他無關,所以 最佳切開點選在「Q的輸入端」 R = R | = R || 1+h -V =100× R9kQ X T R1002 x x x 關聯V跳 vi I I x X 分析步驟: (a)切開閉迴路,切口看人等效電阻R=r=k2 10002 R R₂ + R₁₁ 5 5+13.75 R. 392 {R x101x -Rex(1+h)x R (b) 在響應端並聯一電阻R,並在測試端加上電壓源V ey (C)為了便於分析,於是先定義出各處等效電阻,加以整理,如圖所示 者,分別是: 1₁ I V V bi x 0.1 0.649 + 0.1 R T V co Re5kn 第十四章 負回授放大器 1- R₁ = ₁; +(1+h) (R₁ + R₂)||R₁|=5+ 101×00.649||0.1) rex 21 =13.75k2 (d)迴路增益分析:算法如下所列 Q方面:採用轉導放大,將信號轉成電流信號,再計算進化的 分流。不過,對於Q 而言,此分流為倒流者 Q方面:為射極追隨器,採用電流放大論點,再以分流觀念,計算 流入Q輸入端的電流 V R, www 6402 =h/g=100 20=5k$2. 1000 AI -=100|| 392 Q方面:為共基放大器,因輸入端有分支,遂用轉導放大觀念牙計 算出響應端電壓V RE Rask R₂ www 6402 (R+R) + R₂ Rea0.6k 1002 Re × 0.009×100X R 0.6k25R2 9×1 9+1 V 1000 Re ×R ×g (RRY = 291.27 說明: (1)此迴路增益A3與R 無關,這是因為不考慮r 之故。 (2)若考慮時,則將會干擾R 與此刻的人,而干擾的程度與尺, 門 1. 21 有關。因此,這時的迴路增益A 值將有關於R,所幸,此關聯 性甚弱,遂可忽略之。

求證明(b)的過程😭感謝~

(I) A soccer player kicks a ball at 15 m/s at 20° above the horizontal to another member of the team. At what speed should the second player run in order to reach the ball just as it lands? The initial separation of the players is 25 m. he (II) A basketball player throws the ball with initial velocity vo at above the horizontal to the hoop which is located a horizontal distance L and at a height h above the point of release, as shown in Fig. 4.44. (a) Show that the initial the speed required is given by an vſ gL 2 cosO(tan 9 - h/L) (b) Show that the angle a to the horizontal at which it reaches the hoop is given by tan a = 2h/L - tan 0. = Vo h L FIGURE 4.44 Problem 16

求救 統計#9 （可支薪）

9.A society PAWT is primarily concerned with the amount of TV viewed by todays youth. It asked 300 parents of elementary school aged children to estimate the number of hours their child spent watching television in any given week. The mean and the standard deviation for their responses were 17 and 3, respectively. PAWT then constructed a stem-and-leaf display for the data, which showed that the distribution of the number of hours was a symmetric, mound-shaped distribution. Identify the interval where you believe appropriately 95% of the television viewing fell in the distribution.

急！求救 #6 8 9 如果需要酬勞可私下談 （ex.$70題）

pie participation in informal 6.The National Science Foundation (NSF) sponsored a study on girls' science, technology, engineering, or mathematics (STEM) programs. The results of the study were published in Cascading Influences: Long-Term Impacts of Informal STEM Experiences for Girls (March 2013). The researchers sampled 174 young women who recently participated in a STEM program. They used a pie chart to describe the geographic location (urban, suburban, or rural) of the STEM programs attended. Of the 174 participants, 107 were in urban areas, 57 in suburban areas, and 10 in rural areas. a.Determine the proportion of STEM participants from urban areas. b.Determine the proportion of STEM participants from suburban areas. c.Determine the proportion of STEM participants from rural areas. d. Multiply each proportion in parts a-c by 360 to determine the pie slice size (in degrees) for each location. e.Use the results, part d, to construct a pie chart for geographic location of STEM participants. f.Interpret the pie slice for urban areas. g.Convert the pie chart into a bar graph. Which, in your opinion, is more informative? 7. All high way bridges in the US are inspected periodically for structural deficiency by the FHWA. Data from the FHWA inspections are compiled into the National Bridge Inventory (NBI). Classify each variable below as quantitative or qualitative. a. Length of maximum span (feet). b. Number of vehicle lanes. c. Toll bridge (yes or no). d. Average daily traffic. e. Condition of deck (good, fair, or poor). f. Bypass or detour length (miles). g. Route type (interstate, U.S., state, county, or city) 8. The NBI data were analyzed and the results made available at the FHWA Web site. Using the FHWA inspection ratings, each of the 608,272 highway bridges in the US was categorized as structural deficient, functionally obsolete, or safe. About 13.5% of the bridges were found to be structural deficient, while 3.5% were functionally obsolete. a. What is the variable of interest to the researchers? b. Is the variable of part a quantitative or qualitative? c. Is the data set analyzed a population or a sample? Explain. d. How did the NBI obtain the data for the study?

想請問一下 圈起來的部分 兩個除不盡的分數相減的有效位數要怎麼取

134 ky/mol Two-Point Equation Relating k and T The Arrhenius equation can be expressed in a different form by following the pro dure used with the Clausius-Clapeyron equation in Chapter 9. At two different reperatures, 7 and 71 In k2 = In A E RT 2 ins=1 Ink, = In A- E RT Subtracting the second equation from the first eliminates In A, and we obtain In k Ink, E R 1 T (11.7a k In E 1 RT – 8.31 J/mol K, the activation energy is expressed in joules per mole. (11.75 Taking R EXAMPLE 11.8 GRADED Consider the first-order decomposition of A. The following is known about it: KR the rate constant doubles when the temperature increases from 15°C to 25°C. the rate constant for the decomposition at 40°C is 0:0/25 s" What is the activation energy for the decomposition ANALYSIS Information given: k at 15°C(k); k at 25°C k, = 2k17 a Information implied: R value Asked for: E STRATEGY Take 15°C (288 K) as T where the rate constant is ki. Take 25°C (298 K) as T2 where the rate constant is k2 = 2k1. Substitute into Equation 11.7b. ka E 1 1 1 In R T T2 0.000111 SOLUTION 1 1 (0.693)(8.31) = 288 298 2 1 2k1 In- ki E 1 8.31 J/mol·K 288 298 E = 4.9 X 104 J/mol = 49 kJ/mol 4,949 k] conti

大一心理學！！ 請問第四題為什麼是a? 還有請問第10題的四個選項差別在哪裡以及為什麼答案是c? 還有第11題，題目是不是說一個認知心理學家會問什麼嗎？那為什麼答案會是描述社會文化論的d? 還有第13題也完全不懂... 再麻煩各位了><謝謝！！！

人 提 but Hilda did not. ir 了 tt comfort food than Hilda and non-comfort food. to eat a b. (廁 d more; the same amount of rmore; less the same amount of; more less; more