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Home work 1 1. A circuit is made up from 4 resistors of value 20, 40, 50 and 100 connected in parallel. If the current is 8.6 A. find the voltage drop across the arrangement and the current in each resistor (1 decimal place). 2. One resistor group consists of 40, 60 and 80 connected in parallel and a second group consists of 30 and 60 in parallel. The 2 groups are connected in series across a 24 V supply. Calculate (a) the circuit current, (b) the P.D. across each group and (c) the current in each resistor (all 2 decimal places). 3. Two resistors of 60 ks2 and 40 k2 value are connected in series across a 240 V supply and a voltmeter having a resistance value of 40 k is connected across the 40 ko resistor. What is the reading on the voltmeter (2 significant figures)? 4. Two groups of resistors A and B are connected in series. Group A consists of 4 resistors of values 20, 40, 60 and 80 connected in parallel and group B consists of 2 resistors of values 100 and 150 in parallel. If the current in the 40 resistor is 1.5A, calculate (a) the current in each of the remaining resistors, (b) the supply voltage and (c) the voltage drop across the groups A and B (all 2 decimal places).

Family

1. Who is your nephew's sister? a. Your sister QUIZ: Unit 2 Family b. Your aunt c. Your aunt-in-law d. Your niece 2. Who is your mother's brother? a. Your father b. Your brother c. Your uncle d. Your grandfather 3. Who is your daughter's husband? a. Your son b. Your son-in-law c. Your uncle d. Your uncle-in-law 4. Who is your cousin's mother? a. Your mother b. Your father c. Your uncle d. Your aunt 5. Who is your father's father? a. Your daughter b. Your grandfather c. Your father d. Your cousin 6. Which month is in winter? a. May b. October c. June d. December 7. Look, this is my nephew. name is James. a. Her b. His c. My 8. Nora and Cal are married. They have 3 kids. d. Your names are Jay, Zee, and Tee. a. His b. Their 9. I think this book is a. yours c. Our I saw her dropped it this morning. b. she c. her d. They d. hers 10. Her name is Kate, but name is Joy. a. I b. My c. my d. hers

วิชา PRE380

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)?

Reading 3. Write the topic sentence of each body paragraph: Body Paragraph 1: ............................................................ อ่านต่อ

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กิจกรรมท้ายบทที่ 5 1. จงบอกความหมายของ Data Definition Language 2. คำสั่งที่ใช้สร้างฐานข้อมูลคือคำสั่งใด n. DROP DATABASE 1. CREATE DATABASE ค. ALTER DATABASE . MODIFY DATABASE 3. จากโครงสร้างของตารางต่อไปนี้ให้เติมชนิดของข้อมูล และขนาดที่เหมาะสมลงในช่องว่างของตาราง และ ใช้คำสั่งเพื่อสร้างตาราง ตารางชื่อ Student ชื่อฟีลด์ ชนิดข้อมูล(ขนาด) StudentID StudentName StudentGrade คำสั่งในการสร้างตาราง ความหมาย รหัสนักเรียน ชื่อนักเรียน เกรดเฉลี่ยนักเรียน 4. จากข้อ 3 หากเราต้องการให้ฟิลด์ที่ชื่อ StudentID เป็น PRIMARY KEY ต้องเขียนคำสั่งแก้ไขโครงสร้าง ของตารางอย่างไร

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8.13 Determine which diodes are forward biased and which are reverse-biased in the configurations shown in Figure P8.13. Assuming a 0.7-V drop across each forward-biased diode, determine the output voltage. +5 V OK OVOK -10 V D₁ D₂ D3 (b) +5 V OK -5 VOKH +5 V OK -5 VOKH +15 V R O Vout Q+5 V D₁ D₂ D3 D4 (a) R Vout -5 VOKH +5 V OK D₁ D₂ (c) -10 V R O Vout

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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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13:27 น. 126 4Gป (64) KB/s < Add page description WRITING EXPERIENCE 2 UNIT 11 A. Using Past Tense Verbs Averb in the simple past tense expresses an action that happened in the past at a definite time. Itis used with expressions of past time such asauhile ago, last week and last gear. The past forms of regular verbs end with d or -ed. The past forms of irregular verbs are changed in spelling Examples: Mother bakeda cake last week. She studied her lessons ast night. Jessie has prepared her fnvorite dish for lunch. Practice Wel A. Write the past tense of the following verbs. 1. dance 6. refer 2. listen 7. hear 3. need 8. plan 4. decide 9. work 5. play 10. submit B. Complete these sentences by Writing the correct form of the verbs in the parentheses. 1. Miss Kaye (defend), ber thesis last year. 2. Rene (submit) his project in English two days ago. 3. Early this morning Mother (prepare) , my favorite snack. 4. Yesterday my sister (deposit) , her money in the bank. 5. Iknow that you (enjoy) the concert last week. 84 < 29/72 Replace Rotate Adjust Crop OCR

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3 phase Standoff Hot1 Pole Hot2 Hot3 3 Fuses 3 Transformers- Neutral Insulators 3 Hot drop wires

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Scientists know that the brain is very active READING AND WRITING 4 Read this article. Understanding Sleep when a person is sleeping. There are foน stages, or parts, of sleep. Stage 1 starts after you fall asleep. If there is a noise or a bright light, you wake up Verน easily. In Stage 2, your brain waves are very slow, and your body gets ready for deep sleep. Stage 3 is deep sleep. It's very difficulk to wake up then. Your body rests and grows 0 during this stage. Stage 4 is when you dream. Your eyes move a lot, and your brain waves are fast. This Brain waves during sleep stage of sleep is very important for your memory. After Stage 4, you wake up a little, and then Stage 1 starts again. We go through the four stages of sleep four or five times every night, so we have many dreams in one night. How much sleep do you need? The answer depends on your age. Babies should sleep 15 to 16 hours every day. Children and teenagers need nine or ten hours of sleep, but older people only need six to eight hours. If you sleep for only four hours one night, yoน may just feel tired the next day. But many nights of bad sleep can be bad for your health. People who don't get enough sleep get sick more often. And sleep is very important for learning. It's one reason why students should go to bed early! 3 Answer the questions. 1. How many stages of sleep are there? 2. When do people dream? 3. How many times do we have Stage 1 sleep each night? 4. When does your body grow? 5. How much sleep do babies need? 6. Why shoนld students sleep a lot? 7. Look at the last paragraph again. How much sleep should you get? 8. Do you get enough sleep? UNIT 6 The mind