求解🙏

The photoelectric effect can be used to measure the value of Planck's constant. NOTE: The following data are fictional, and will give a result that is quite different from the real value of Planck's constant. Be sure that you do not use the real value of Planck's constant in any calculations here. 1 S -1 Suppose that a photoelectric effect experiment was carried out using light with v = 7.56 × 10¹4 s-¹, and ejected electrons were detected with a kinetic energy of 2.41 × 10-¹1 J. The experiment was then repeated using light with = 9.81 × 10¹4 s and the same metal target, and electrons were ejected with a kinetic energy of 9.09 × 10-¹1 J. Use these data to find a value for Planck's constant (in J • s). Hint. It may help to start by thinking about how you would calculate the metal's binding energy if you already knew Planck's constant. Submit Answer S Try Another Version 2 item attempts remaining

想請問這題的(b)怎麼解！

Question 3: If f(x)=x³+3x+1, evaluate (a) f'(2) and (b) (-¹)(15). Sele

想問3-9的a跟c

Problems 3-1. Explain the difference between *(a) random and systematic error. (b) constant and proportional error. *(c) absolute and relative error. (d) mean and median. *3-2. Suggest two sources of systematic error and two sources of random error in measuring the length of a 3-m table with a 1-m metal rule. 3-3. Name three types of systematic errors. *3-4. Describe at least three systematic errors that might occur while weighing a solid on an analytical balance. *3-5. Describe at least three ways in which a systematic error might occur while using a pipet to transfer a known volume of liquid. 3-6. Describe how systematic method errors may be detected. *3-7. What kind of systematic errors are detected by varying the sample size? 3-8. A method of analysis yields masses of gold that are low by 0.4 mg. Calculate the percent relative error caused by this result if the mass of gold in the sample is (a) 500 mg. (b) 250 mg. V(c) 125 mg. (d) 60 mg. 3-9. The method described in Problem 3-8 is to be used for the analysis of ores that assay about 1.2% gold. What minimum sample mass should be taken if the relative érror resulting from a 0.4-mg loss is not to exceed *(a) -0.1%? (b) -0.4%? (c) -0.8%? (d) - 1.1%? 3-10. The color change of a chemical indicator requires an overtitration of 0.03 mL. Calculate the error if the total volume of titrant is percent relative (a) 50.00 mL. (c) 25.0 mL. 3-11. A loss of 0.4 mg of Zn occurs in the course of an percent relative analysis for that element. Calculate the error due to this loss if the mass of Zn in the sample is *(b) 10.0 mL. (d) 30.0 mL. 190 (c) 188 (d) 4.52 x 103 4.63 x 103 4.53 x 10 ³ √6 *(a) 30 mg. (b) 100 mg. *(c) 300 mg. (d) 500 mg. 3-12. Find the mean and median of each of the following sets of data. Determine the deviation from the mean for each data point within the sets, and find the mean devi- Vation for each set. Use a spreadsheet if it is convenient. *(a) 0.0110 0.0105 (b) 24.53 0.0104 24.68 24.81 24.77 39.61 862 (f) 850 MA 3-13. Challenge Problem: Richards and W the molar mass of lithium and colle data. 24.73 Experiment 1 2 3 4 5 6 194 447 X 10 7 448 X 107 4.58 X 10 (a) Find the mean molar t workers. (b) Find the median molar ma (c) Assuming that the cam molar mass of lithium is the absolute ertor and of the mean value demi Willard. (d) Find in the chemical ues for the molar mus since 1910, and ag a table or spreadshera 1817 given in the a Richards and Willd. Com mass versus year to la of lithium has chang Suggest possible abruptly about 18 ant de (e) The incredibly deals Richards and W that major changes will occur. Disc calculation in pat (f) What factors ha since 1910? (g) How would you mass? 6See Chapter 2 of Applications of Microsoft Excel in Analytical Chemistry, 4th ed., for information about statistical 7T. W. Richards and H. H. Willard, J. Am. Chem. Soc., 1910, 32, 4, DOI: 10.1021/ja01919a002. built-in statistical functions. "Answers are provided at the end of the book for questions and problems marked with an asterisk The I of ₂ or inc rce of able vas error c often in individu ate resul data in rtainties. dimensio andom e analysts The result

求求各位大神幫我解第3、4題？ 第一題是（5，20） 第二題是（3，21） 不知道我算的對不對， 麻煩各位大神幫幫我🙏🙏🙏

Problem 5: SE & IE A college student has two options for meals: eating at the dining hall (D) for $6 per meal, or eating a bread (B) for $1.50 per meal. Her budget is $60. 1. Draw the budget constraint showing the trade-off between dining hall meals and bread. Assuming that she spends equal amounts of expenditure on both goods as her optimum choice. What is this optimal choice (D,B)? Label the optimum as point A. 2. Suppose the price of a bread now rises to $2. Using your diagram from part (1), show how the change in price affect the budget line. Assume that the student now spends only 30 percent of her income on dining hall meals as her optimal choice. What is this optimal choice (D',B')? Label the new optimum as point B. 3. Use points A and B to draw a demand curve for bread. 4. Please write down the definitions of inferior good and normal good. For the student, is bread a normal good or an inferior good? Please explain. (Hint: Changes in consumption caused by this price change can be decomposed into substitution effect and income effect.)

求助幫忙 目的是讀入資料，依性別計算身高、體重、年齡的平均，將結果寫入csv 檔案 現在目前我已經把資料成功讀入了，但到計算平均就卡住了 請各位大神幫我看看是那邊出錯了 感謝🙏

} ] v 20 秒 0 秒 from google. colab import drive drive. mount('/content/drive') Mounted at /content/drive [6] import pandas as pd data = pd. read_csv('/dataset_1 (3).csv') print(data) 0 1 2 3 4 539 540 541 542 543 height; "weight"; "age"; "male" 151.765;47.8256065;63;1 139.7;36.4858065:63:0 136.525;31.864838;65;0 156.845;53. 0419145;41;1 145. 415;41. 276872;51;0 145. 415;31. 127751;17;1 162.56;52. 16308;31;1 156. 21;54. 0624965;21;0 71. 12;8. 051258;0;1 158.75;52. 5316235;68;1 [544 rows x 1 columns]

請問有人可以幫我解這三題嗎

2. The financial statements in the year 2021 and 2022, for Kosinski AG contains the following condensed information. December 31 2022 2021 Property, plant&equipment €236,500 €150,000 Accumulated depreciation (37,700) (25,000) Long-term investments 0 15.000 Inventory 35,000 42,000 Accounts receivable (net) 43,300 20,300 Cash 30.900 10,200 €303,000 €212,500 Share capital-ordinary €130,000 € 90,000 Retained earnings 70,000 29,000 Long-term notes payable 70,000 50,000 Accounts payable 21,000 17,000 Accrued liabilities 17.000 26,500 €308,000 €212,500 Additional information for 2022 is: 1. Income before income taxes for the year 2022, €98,800. 2. Depreciation on plant assets for the year, €12,700. 3. Sold the long-term investments for €28,000. 4. Paid dividends of €35,000. 5. Purchased machinery costing €26,500, paid cash. 6. Purchased machinery and gave a €60,000 long-term note payable. 7. Paid a €40,000 long-term note payable by issuing ordinary shares. Paid income taxes of €22,800 for 2022. 8. Instructions: 1. Cash generated from operations = € 2. Net cash provided by operating activities = € 3. Net cash provided by investing activities = € 4. Net increase (decrease) in cash = € @ 5. Free Cash Flow = € @ 填空题 (25 分) 159 (請依照醫目中的填空位置依次填寫答案) Ⓒ29,000 54,200 1,500 20,700 -89400

想請問這兩題月份要從哪裡開始算？謝謝

On 1/10/2020, Asfalisi Insurance Limited entered into an insurance contract with a customer who paid the annual premium of $240,000 on that date. State the dollar amount Asfalisi Insurance Ltd would report as revenue for the year ended 30 June 2021. Question 33 1 pts On 28 February 2021, Esoda Ltd invested $550,000 in a 2-year fixed term deposit earning 3% p.a. Interest is paid quarterly and Esoda Ltd received the interest it was due on 31 May 2021. Calculate, to the nearest whole dollar, the amount of accrued revenue Esoda Ltd would recognise at 30 June 2021.

為什麼第五題要用movies 而不是movie 同樣都是第一人稱 第一題為什麼是用tennis 而不是tenni

见 Last 24 根抽娱乐,詢問 Liz 有關她自己和她家人的問題。 1. Y u know that Liz plays tennis. You want to know how often. Ask her. dow often do you play tennis 2. Perhaps Liz's sister plays tennis, too. You want to know. Ask Liz. who Doen your sister play tennis 3. You know that Liz reads a newspaper every day. You want to know which one. Ask h- Which newspapera, do you ready 4. You know that Liz's brother works. You want to know what he does. Ask Liz. What doey your brother do 5. ou know that Liz goes to the movies a lot. You want to know how often. Ask her. How ofen do you go to the move moviey 0. You don't know where Liz's grandparents live. You want to know. Ask Liz. Where does your grand parents live a

大一公衛系微積分，求第二題解

公衛系 微積分期末考 (28/12/2018) 1. Use the Laplace transform to solve the differential equations. (1) j(t)+2y(t) = x(t), y(0)=1, x(t)=10, t20 (20) (2) Intravenous glucose is a treatment. Disposed at a fixed rate k grams per minute inputs into the blood, while blood glucose will be converted to other substances or moved to another place, at a rate proportional to the amount of glucose in the blood, the proportionality constant is a (a> 0), the initial amount of glucose in the blood is M. A. Find the variation in the amount of glucose in the blood (15) B. Determining the equilibrium, the amount of glucose in the blood. (5) = 2. SI Epidemic Model : The size of the population, n+1, remains fixed. Let i(t) be the number of infectives at time t, and let s(t) be the number of individuals who are susceptible. Given an initial number of infectives iO), we would like to know what will happen to i(t). SI Epidemic Model is described by the differential equation. di(t) = k·i(t).s(t) ......(5.1) dt i(t)+s(t)=n+1 i(0)=i, (1) Solve this differential equation of the SI Epidemic Model (5.1). (10 h) (2) What is the peak times t of the epidemic spread? (10) 3. Consider the Two-compartment physiological models and is shown in figure 1. C1 (t) represent the drug concentration in the first compartment and C2 (t) represents the drug concentration in the second compartment. Vi and V2 represent the compartment volume. Use the first order linear differential equation general solution to solve the C1 (t) (20 ) and use the Laplace transform to solve C2 (t). 【20 分). | 世」!()

請問第16題怎麼寫，感恩🙏

8. M () 12 -31 1 1 In Exercises 9 through 16, find all vertical and horizontal asymptotes of the graph of the given function 3x – 1 X = 10. f(x) 9. f(x) = - x + 2 2 - x 2. 12. f(t) = = t + 2 12 x² + 2 11. f(x) x² + 1 2 + 3t - 5 13. f(t) = 2 - 5t+ 6 5x2 = 14. g(x) = = - x² – 3x - 4 1 1 t 15. h(x) h(x 16. g(t) = = X X 1 V? - 4 In Exercises 17 through 32, sketch the graph of the given function. 17. f(x) = x3 + 3x² – 2 18. f(x) = x - 5.x+ + 9 19. f(x) = x4 + 4x + 4x2 20 - = = flr