哪一個段落沒有主題句？ 我覺得是第一個，對嗎？ 要怎麼替這個段落寫出主題句呢？

2 Despite different home cultures and countries, international students' main overall motivation is the desire get out on their own, to carve out a new direction in their lives. "Foreign students" do not casually abandon the comforts of family and cultural ties; they have done their homework on Canadian schools. All their preparation, though, cannot prepare them for the loneliness and ongoing difficul- ties they face, from cold winters to financial issues related to the higher tuition fees they must pay. Some students, though, emigrate to escape those same tight- knit families and bonds that others find so painful to leave behind. A Macleans "On Campus" report notes that family expectations may be opposed to students' visions for themselves and lead them to reject accepted values and career paths in their hometowns and countries. Csilla, a web-design student at Waterloo admits, "I was always supposed to enter my family's restaurant business in Budapest, but I felt suf- focated even working part-time as a server. Web design is my passion, and I wanted 12: CAUSE OR EFFECT [- a completely fresh start, something that is completely my own ("International Stu- dents"). Finding independent paths to their own dreams is the key here, whether students choose those paths as a result of personal ideals or as a reaction to pre-set future plans.

光學第3題（2.38）請問如何解選項c🙏

3.00 85 09:49 ul. RES Optics Homework 1...748220677e2a.pdf ka KI : 。 Optics Homework 1 1. 2.2* Show that the function $(y, t) = (y – 40) is a solution of the differential wave equation. In what direction does it travel? 2. 2.6 How many wavelengths of a green laser (1 = 532 nm) can fit into a distance equal to the thickness of a human hair (100 um)? How far will the same number of waves extend if they originate from a micro- wave oven (v = 2.45 GHz)? 3. 2.38 Which of the following expressions correspond to traveling waves? For each of those, what is the speed of the wave? The quanti- ties a, b, and c are positive constants. (a) (z, t) = (az – bt)? (b) y(x, t) = (ax + bt + c)2 (c) 4(x, t) = 1/(ar? + b) 4. 2.43 Write an expression for the wave shown in Fig. P.2.43. Find its wavelength, velocity, frequency, and period, Figure P.2.43 A harmonic wave. I=0 40 100 300 500 -20 401 -60 0.66 X 10-15 (nm) 100 300 500 I = 1.33 X 10-15 (nm) o 二

請問c.d要怎麼寫？

ADDITIONAL PROBLEMS AND APPLIC 15 gr niewolt a 10 nog noos MyLab Economics You can work these problems in Homework or bloem Production Possibilities and Opportunity Cost mon Use the following table to work Problems 11 and 12. Suppose that Yucatan's production possibilities are Food Sunscreen (pounds per month) (gallons per month) 300 and bany 70 dating the 200 and 50 U yolo 100 and 100 0 theo and ved 150 e 150 nano 11. a. Draw a graph of Yucatan's PPF and explain how your graph illustrates a tradeoff.honna b. If Yucatan produces 150 pounds of food per Du month, how much sunscreen must it produce per i if it achieves production efficiency? the t First c. What is Yucatan's opportunity cost of produc- utons ing (i) 1 pound of food and (ii) 1 gallon of 1 sunscreen? on nood bad odor 15 d. What is the relationship between your answers to part (c)? ora lo 12. What (feature of a PPF illustrates increasing opportunity cost? Explain why Yucatan's opportu- nity cost does or does not increase. 01 f a

速速🙇‍♀️

boolse SUP Anna has many dresses. (用 Some of. 合併句子) Some are expensive. VSO Simon will buy a car. biq ( ... if... AlfaF) Simon will drive it to work. o og olon am lasat | Anita ate like a bird. ( ... although... AlfaF) Anita didn't become thin. Some of the snacks here taste delicious. (畫線處用 food 改寫句子) Most of the homework is easy (畫線處改為代名詞)

嗯...不會統計更不會英文統計 有人可以教嗎🥺

Homework #1 TabletPC Comparison providesawide variety ofinformation abouttablet computers. The company's website enables consumers to easily compare different tablets using factors such as cost, type of operating system, display size, battery life, and CPU manufacturer. A sample of 10 tablet computers isshowninTable 1. (1) How many elements are in this data set? (2) How many variables are in this data set? (3) Which variables are categorical and which variables are quantitative? (4) What type of measurement scale is used for each ofthe variables? Table 1 Product Information for 10 Tablet Computers 點 Cost Operating| Display Size | Battery Life」 CPU (9 | System | (inches) (hours) |Manufacturerl AcerIconia W510 599 [Windows| 104 85 Intel Amazon Kindle Fire HD | 299 |「Android 89 9 TI Apple iPad 4 499 | ios 97 1 Apple HP Envy X2 | 860 [Windows| 116 8 Intel Lenovo ThinkPad Tablet| 668 「Windows| 101 105 Intel MicrosoftSurface Pro | 899 「Windows| 106 4 Intel Motorola Droid 530 「Android 1041 9 TIOMAP XYboard Samsung Ativ SmartPC| 590 「Windows| 116 7 Intel Samsung Galaxy Tab 525 「Android 104 10 Nvidia Sony Tablet 5 360 」Android 94 8 Nvidia 寢 For each of the following variables, indicate whether it is quantitative or qualitative and specify the measurement scale that is employed when taking measurements on each: (1 Class standing of the members of this class relative to each other (2) Admitting diagnosis of patients admitted to amental health clinic (3) Weights of babies born inahospital duringayear (4) Gender of babies born inahospital duringayear (5) Range of motion of elbow joint of students enrolled inauniversity health sciences curriculum (6) Under-arm temperature of day-old infants born inahospital

求第二題、第七題詳解

題1 題3 題4 LT 盒汪坊 一汪江 題5 題6 Homework 3 1. 電阻值為 Ri=# 3G, R2= 60和 Ra=5Q的電阻器連接成如下圖 無呢系列的電阻器 ; 從X和 Y 兩端連接的等效電阻值為何? 2. 下圖電路中的伏特計量到的電壓為 12V ; (a)求電池的電動勢 &為何? (b)當開關 S 關閉時,安培計上的電流為何? 3. 一混合動力的新車質量為 1200 公斤, 這輛車使用 360 伏特 電池驅動電動馬達產生的最大電流為 200 安培 。當汽車以 22 公里/小時在一斜坡等速爬升 並不使用汽油馬) 達來協助 gp 找到最大的坡度 ? 4. 如圖 ,一個錐狀導體長度為 L ,左右兩側的半徑分別為3和 6 (且 2多,它的電阻率為p,將它的左右兩側分別接在電池兩 端,求此導體的電阻為何? 5.一個導體球殼內外徑分別為 3和 5,它的電阻率為p,將它的 內外徑分別接在電池兩端,求此球殼的電阻為何? 6.一平行板電容器具有面積 10 cm?的板,由 0.1mm 的玻璃絕 緣層隔開,電阻率p=1.2 x 1070O.m,介電常數k =5.6。(a) 如何以電路圖中表示這種漏電的電容 ? (b) 求出該電容器的 時間常數,該時間常數只取決於絕緣材料的特性。 7.如圖 ,一無電荷的電容 和 和一電阻 8&=5x10 人 ge=5V 串聯連接在一起。求(a)電路的時間常數? (b)電容的 電量? (o) 的還大生 (d)電 量的時間函數? (e)電流的 時間函數? A bm G@ 六 R / 1 AS Y防 自 題1 題2 題4

求第五題詳解

Homework 2 . 一個電四偶極為一個帶 2Q 電量的電荷位於原點 ,與另外兩個帶-Q 電量的電荷分別在 x=+a 的位置所組成 ;P 點的座標為(x,0) ,當 x>>a 時;求系統在 P 點的(a)電位 V(b)電場E 為何? . 一半徑為 R 的球的電場為計- Eo(r/R)?f,其中 Eo是常數,r是到球心 的距離。求出從球體表面到球心的位能差。 . 一線電荷在x軸上 從-L / 2延伸到L/2 峽電荷密度為2=X0(x/L)?, 其中%0是常數。在 x 軸上求出 x>L / 2的位能的表達式。檢查表達 式在x>>L/ 2是否符合期待的結果。 . 一半徑為 8的帶電圓盤,它的電荷密度0=Cr“,此處r為電荷盤中 心的距離,C 為一常數 ;如圖,在x軸上的一點P ;試求(a) 在點 P 的電位為何? (b) 應用 Ex= ~-ov/ox,求在點P 的電場? - 兩個球半徑分別為 3和 5,組成一個電容器,兩球的距離為 ?遠大 於兩球的半徑 ; 證明電容器的電容值 C=4mtgo/(1/a+1/全2/9? . 電容值為 Ci=3hF, C2=2hF, 和 C3=6HF 的電容器連接成如下圖無窮 系列的電容器;從X和 Y 兩端連接的等效電容值為何? . 一個面積為 A 的平行板電容器,兩板間的距離為 x;)兩平行板所儲 存的電量分別為+Q 和-Q 。當電池被移除後 ,兩電板之間的作用力為 AU了 (Hint Fe = -gU/odx (= 1/2 @/O0 題1 題3 題4 "一一選

第1題和第5 6 7題，有大大能幫解出計算過程嗎？ 謝謝

略語上 點加圖點 Homework 1 1. 如圖,三個電荷分別在直角三角形的三個頂點 ,已知 qs=+1.0 hlC,qi的電量 為6.4 HC ,但不知電性 ,q2的電量和電性都未知 ; 電荷 q3 所受的合力在負x 軸方向。(a)考慮電荷 qm 和 q2 不同的電性 ,畫出四種受力的組合。(b)利用(a) 的結果求出電荷 q 和 q2 的電性? (c)計算出電荷 q2 的電量? (d)求出電荷 qs 所受的合力? 2. 一半徑為 R 的半圓形環上帶有均勻分佈正電荷 Q,求圓環中心的電場。 3. 如圖,兩長度 L 的棍子沿著 x軸方向放置,一根棍子在x=a/2 和x=a/2+L 之間,另一根棍子在x=-a/2-L 和 x=-a/2 的位置 ; 每一根棍子上的電量為Q 均勻分布在棍子上。。(a) 計算第二根棍子在正 x軸上所產生的電場? (b)證 明兩根棍子之間的相互作用力F=kQ7/L7*/g[(a+L) 2/(a*(a+2L))] 。 4. 如圖,一長度為 4cm 距離為 1cm 電場 E=10” N/C 的平行電板 ; 一個電子由 平行電板左邊中點以與水平夾角9=30" 射進平行電板。當電子直接射出平行 電板時,求電子速度範圍為何? 5. 一寬度為 d 的絕緣帶電厚板,它的電荷密度p= Cx ,此處 x為厚板內任一點 至厚板中心的距離,C 為一常數;厚板的y和z 方向延伸至無窮遠。試求空 間的電場(a)厚板外部 (lx| > d/2) (b) 厚板內部 (lx| < d/2)。 6. 半徑為R的無限長實心圓柱體帶有不均勻電荷密度分佈 電荷密度p =po(r/R), 給出的,其中po是常數,r 是距圓柱軸的距離。求出電場的r表達式。 7. 如圖,一個帶有均勻體積電荷密度p且半徑 2a 的非導體球,挖空球內的一個 半徑 a的小球裡的電荷 ; 證明小球內的電場 g =0和蕊=pa/(3&g09)- +lmc. 涼 / 一8一 4 2 K交 / 人 姜- ‧下co一一 六 2.L 二32 92 二32L 題1 題3 4em 生 唔 和 NC em 題4 題5