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Dimensional Analysis Practice 1. 261 g →> kg 2. 3 days seconds 3. 9,474 mm cm 4. 0.73 KL →L 5. 5.93 cm³ → 3 m³ 3 6. 498.82 cg mg minutes 7.1 year 8. 4.65 km → m 9. 22.4 kg/L to kg/mL 10. 0.74 Kcal/min to cal/sec 11. 1.42 g/cm² to mg/mm² 12. 9.81 m/s² to ft/s² 13. 8.41 g/mL to Kg/L 14. 8.24 g/cm² to mg/mm² 15. The total amount of fresh water on earth is estimated to be 3.73 x 108 km³. What is this volume in cubic meters?

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2. A chemical company is considering options for eliminating harmless chemical sludge from the following 2 options. (1) Prepare the site for landfilling in the factory. This option requires the initial investment for purchasing the essential equipment 130,000 Baht. Each year there will also be a cost of landfill operation 95,000 baht per year. At the end of its service life of 3 years, the equipment used within the landfill site will have a salvage value of 20,000 baht. (2) Hire a chemical sludge removal contractor to remove sludge. The contract term must be 6 years. The cost of contract to be paid to the contractor are 110,000 Baht a year in year 1-2; 115,000 Baht in year 3; 120,000 Baht in year 4; 125,000 Baht in year 5; and 130,000 Baht in year 6. a) (13 marks) If the company finances the money for this project by borrowing from a bank in which the bank charges interest on loans at the rate of 3.86% per 6 months, compounded every month. Which option should this chemical company choose? b) (5 marks) The company executives believe that the option of establishing a landfilling site within the factory seems to be a more sustainable alternative for the company. If the selection in question a) above did not select the landfilling site option, please suggest how much the initial investment for purchasing the equipment should cost so that the landfill option would be selected (assume the same salvage value of the equipment)?

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18:35 < document Mr. Vanny Heng_ESL Teacher_Level 4 B Circle T for true or F for false. 1. Bethany Hamilton only surfed on the weekend. 2. Bethany Hamilton won competitions before she was 10. 3. Bethany Hamilton was attacked by a shark 4 Bethany Hamilton stopped surfing for three months. 5. Eric Yuan drove for 10 hours to see his girlfriend. B. Eric Yuan tried to get a visa oight times. 7. Eric Yuan started his company the year he arrived in the US. & Eric Yuan has a wife. C Complete the paragraph. Use the simple past of the verbs parentheses. (travel) alone for the first time. I (2). At the age of 13, 1(1). to visit my grandparents in Los Angeles. 1). far, but my mother (4) on the airplane and B) (0) airport and 8). two weeks, and I (11) (sit) next to me. My grandparents (B). (take) me to their home. I (10). my first time in Los Angeles, and I (13). the end, I (14). BLESSONS LEARNED (not, want) to go home! 2. Studying is important, & The study group meets on (have) so much fun with them! It (12). 4 I've been preparing for & She's taking guitar & I hope to get good 1. Did you -(go) (feel) very nervous about traveling so (get) (say). "Don't worry. You'll be fine." I (5) (talk) for a long time to a very nice woman who (meet) me at the (stay) there for VOCABULARY AND GRAMMAR A Match the sentence halves. 1. Which classes are Mr. Vanny Heng_ESL Teacher_Level 4 (30 .(be) (see) lots of really interesting places. In a. grades this time. b. but we can have fun, too. B Complete the paragraph with the words in the box. Use the simple past. be find get go live finish When Chang was young, his family (1) (2) (4) 4G+ + 48% | c. my final exams for months. d. lessons after work. LIVEWORKSHEETS TF T F T F T F T F T F move TF TF e. you taking this year? f. Thursday afternoons in the library. 9. pass or fail? want in a small town. When he was eight, they to Shanghai. Chang (1) a good education there. He college when to become a computer programmer. He (5). he was 20 years old. Then he ). to New York City for a job interview. Chang (7) very lucky, and he got the job. He also (8). a cheap apartment, which was also very lucky, Chang invited his parents to visit him, but it was too far for them to travel. Q WL2 : WL2 1/2 LIVEWORKSHEETS 2/2

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คํานาม กวนักเต้น undir Taklattar Toledne DVD winder ปริศนา! บุปผาแห่ง ตอน โรงเรียนเทม 1:44:33 เดอะมูฟวี่ ตอน ปริศนา บุปผา แห่งโรงเรียนและ POPS Anime Thaland 99 2.3u 0 4 OPPO A18 2023/11/07 13:28 Unit 1: Welcome to our company Worksheet 1.1 Direction: Complete the conversation with these words. แอดเด4 Conversation 1 A: B Jane Henley. A: A: B: A: B B: Yes, Henley is my (2) OK. Where do you (3) A: address OSH / DE Driller B: What's your (1) A: K Is Jane your given name? Conversation 2 ay 55 explosives BBL company. How old are you, (4) 28 years old. 28? OK. Good. What's your Job? I'm a (5) Thank you, A : Can you (6) A: What's your name, please? B: John Kate. on an oil rig. B: Yes, Sure. It's J-O-H-N-K-A-T-E. A: Thank you. And what is your (7) เหม name aulas surname B 45 Julienne Street, A: OK. What is your postcode? B : 24359. ? that, please? do Whey - Morname please

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Exercise 4 (p. 32): Underline the errors and write a correction. Assignment Irrigation Irrigation management is an interesting field, especially in places where water supplies are low. Irrigation experts have various tasks such as taking soil samples, checking existing water tables, and projecting the amount of rain for the future. These people usually get his degrees from irrigation institutes. Them study many years in order to become familiar with the various tasks involved in her profession. For some of they, a job with local water authorities is a good place to begin his career. Others prefer to find jobs as contractors, working independently to aid farmers with our irrigation needs. Whatever the job, irrigation experts are becoming increasingly important. Water is a precious commodity, and they cannot be taken for granted.

ช่วยหนูหน่อยนะคะ

CONVERSATION A Match the sentence parts to complete the expressions of disagreement. 1. |donไ a. true. b. I disagree. 2. That's not 3. T'nา not C. what you're saying, but.. 4. I'm afraid d. So Sure about that. 5. | know e. agree. B Read the statements and give your opinion and a reason. If you disagree, uรe one of the expressions from A. Example: Yoนng people should get an apartment after they finish high school. |dont agree. Sone tcen.agers arcntrzady to live alone. 1. People shouldn't get married before they're 30 years old. 2. The best place for older people to live is with their children. 3. Mothers should not work outside the home. 4. People should live with their parents until they get married. 5. Small children should watch as much television as they want. 6. Couples with children should never get divorced. 7. Both boys and girls should help with the housework. 8. Day care is bad for children. 9. Both parents should work full-time.

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my Salary is still not enough for living. While 1 frequentiy work overtime during weekends, Hl/ 1 'า Jack. I've just earned my high school ploms and recently got a job. Even though ) 79 Unit 6 Waitperson ลking full-time at a small factory, I have a ลงd-time job as 8 waitperson at a restaurant าลงr my house. I'm a waiter from 6.00 - 11.00 2m. every night. Activity 6.14 From Jack's introduction of himself, is he a hard-working Person? And why? Activity 6.15 From the key functions of a waitperson with good manners elow, please rearrange them in order of time since customers come int0 a "staurant. Number the activities from 1 to 8. Time Sequence Activities Looking around for customers additional requests Serving food Taking orders Preparing a check/a bill Collecting money Seating customers 8) Saying thank you to customers Video Walter and Waitress Career 1) Greeting customers คำว่า Check เป็นการใช้แบบ American English ส่วนคำว่า Bill เป็นการใช้แบบ British Eng|lish ไดยเมื่อลูกค้าต้องการ ให้พนักงานคิดเงินค่าอาหาร ก็จะบอกกับพนักงานในร้านว่า Can I have a check ก็ได้ความหมายเหมือนกัน

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P a8e \16 ฝดสี่เหลืกร ศัก T/F T/F TRUE / FALSE: Read the headline, True (T) or False (F). Plants (B1) 1. Schools always taught children that there were five oceans. T/F Pla 2. The Southern Ocean goes around the South Pole and Antarctica. T/F actually, 3. National Geographic says the Southern Ocean is not a real ocean. T/F FC 4. A geographer said it was important to recognise the Southern Ocean T/F animal 5. The Southern Ocean can impact how children view the world. T/F too. Plะ 6. The Southern Ocean can help children to learn about climate change T/F grow 7. The Southern Ocean has fragile ecosystems. every" 8. The article says the Southern Ocean is home to polar bears. impe SYNONYM MATCH: Match the following synonyms from the article. Column B fror Column A a. opinion the 1. thought b. genuine 1) 2. show C. area 3. real C d. reveal 4. viewpoint e. sea 5. attention f. delicate 6. impact g. believed 7. distinct h. affect 8. region 9. fragile 1. separate 10. marine j. awareness Write the meaning of these words in Thai. "Without a healthy environment we cannot end poverty or build prosperity. We all have a role to play in protecting our only home: we can use less plastic, drive (e5, Waste less food and teach each other to care." - Secretany-General, Antonio Guterres healthy environment poverty build prosperity protect role waste without Acmowledgement The complaton sspsclicay Put tonetherInto

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เกิดไรขันกังสั้งแวดล้อมyo) (งา แปลว่า ด ทับ What is happening to.the Environment? Rivers mพัยใหม่ A new study shows that 86 per สะพวณขัมแม่น้ำเทพ cent of the world's rivers have been damaged by human activity. The study was Conducted by researchers from a university in Toulouse, France. เคทะน์ They examined data on over 2,500 rivers around the world)but they did not Look at rivers in the polar regions of the Arctic and Antarctica or in deserts.)The scientists looked into changes to biodiversity over the past 200 years. They)discovered that biodiversity in over half of rivers has been seriously damaged by humans. The researchers said there were many reasons for this damage. A big reason is the introduction of new species of fish into rivers. Other reasons include polution, dams, overfishing, farming and ปลก) : อ่างๆ mราะน climate change. The researchers say the worst-hit rivers are in western Europe and North America. This is because these regions have large and rich towns and cities. The เมือที่มาฐานางเบ lead researcher said: "Rivers which have the most economic development around ่"ง them, like the Mississippi River, are the most strongly impacted." The River Thames inj London was one of the worst-affected rivers in the study. The least- impacted rivers are in Africa and Australia. The researcher said: "This is probably due to a slower rate of สูคนที่ 90 191 เสชมา ความ นนา Iณนนยฆาก industrialisation in Africa and low population density around rivers in Australia." He added that rivers in many rich nations are unrecognisable compared with how they were 200 years ago. เลวมาก เลวที่สุด / HgrSe / the Nor s t 3/ be tey / the st ดีมา ก ดที่สด Acknowledgement

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HN) Exercises (1)You take 200 milligrams of a headache medicine, and after 4 hours, 120 milligrams remain in your system. If the effects of the medicine wear off when less than 80 milligrams remain, when will you need to take a second dose, assuming the anmount of medicine in your system decays exponentially? 13 ส.ค. The half-life of Radium-226 is 1590 years. If a sample initially contains 200 mg. how many milligrams will remain after 1000 years? )The half-life of Fermium-253 is 3 days. If a sample initially contains 100 mg, how many milligrams will remain after 1 week? บ้อ The half-life of Erbium-165 is 10.4 hours. After 24 hours a sample still contains 2 mg. What was the initial mass of the sample, and how much will remain after another 3 days? The half-life of Nobelium-259 is 58 minutes. After 3 hours a sample still contains10 mg. What was the initial mass of the sample, and how much will remain after another 8 hours? (6) A scientist begins with 250 grams of a radioactive substance. After 225 minutes, the sample has decayed to 32 grams. Find the half-life of this substance. A wooden artifact from an archeological dig contains 60 percent of the carbon-14 that is present in living trees. How long ago was the artifact made? (The half-life of carbon-14 is 5730 years.)