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Quiz 2 (Force and force in nature) Instruction: Do all problems and show your work in detail and step by step (20 marks) (Given: earth radius = 6,400 km, mass of earth = 6x1034 kg, G=6.67x10-11 Nm/kg) 1. Two objects mass 10 and 30 kg are 2 m. apart. How much is gravitational force between these two objects? (2 marks) 2. An object mass 120 kg is now at a distance 4 times of radius of the earth from the center of earth. How much is weight of this object now? (2 marks) 3. An object weight 50 N at a distance 4 times of radius of the earth from the surface of earth. How much is weight of this object at earth surface? (3 marks) A magnet bar is placed as shown in the diagram below. If four compasses are placed at point A, B, C and D, match the correct compass 1, 2, 3 or 4 on point A, B, C to D. (Hint: Compass can be used more than once) 4. A= B =. C = D = 3 4

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Underline phrases in these sentences. 1. There is one thing to cook breakfast every day. 2. is there anything to do before sunset? 3. | have no money to give you now. 4. | am very glad to have him back here in time. 5. | forgot buying a bottle of milk. 6. Tom stopped to smoke. 7. Living a simple life without competition can bring you peace of mind. 8. Tom is good at playing football. 9. The knowledge is learning something every day. 10. The gentleman crossing the street is an old friend of my father's. 11. Bill and Mary, hoping to pass this course, are working very hard. 12. Many tourists having stayed in Thailand like the hospitalities of Thais. 13. The students marching along, the people stood on both sides of the road. 14. Supported by the people, President Reagan made sure that he won the election. 15. President Reagan, Supported by the people, made sure that he won the election

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A Complete the sentences using the correct form of have to in the affirmative or negative. 1. Ve go to class tomorrow because it's a holiday. 2. All students take an exam at the end of the year. 3. Children under ten pay to watch the game. It's free for them. 4. I learn addition and subtraction tables when I was in first grade. 5. Jake clean up his room once a week. age? 6. You be very patient to be a good teacher. 7. I'm sorry, I can't come tonight. I babysit my little brother. 8. Mei Study a lot because she is very intelligent and 1learns things quickly. B Complete the sentences. Use your Own ideas. 1. I don't have to 90 to school tomorrow 2. Tomorrow I have to 3. In our school, students have to 4. In the past, students had to 5. Children dont have to 6. My father has to 7. My mother doesn't have to 8. Drivers in our town have to 11

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Grammar NOTE Never use the present perfect tense with a finished time word. Ex. /ve been to another country yesterday. x (5 Look at the table. Present Perfect Simple vs. Past Perfect Simple The present perfect is used to talk about an action which happened between the past and now. form: have / has + past participle T have traveled to Madagascar three times in the last year. My uncle has traveled to New York 20 times. Have you ever been to another country? The past perfect is used to talk about an action which happened before another action in the past. form: had + past participle T had already been to the store before my brother woke up. Before I graduated, I had filled out several university applications. Fill in the blanks with the given verbs and tenses. 1. They to Australia twice. (travel, present perfect) 2. Stephen for the airline for 25 years. (Work, present perfect) 3. You said that before you ate lunch, you .your mother. (call, past perfect) 4. Kerry the entire bottle of water before she got to the halfway point in the race. (drink, past perfect) 5. I met them after they to the Countryside. (be, past perfect) 6. | my ticket, so couldn't get on the plane. (forget, past perfect)

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Listen and complete the conversation with the words you hedr. 1-04 จls Anderson: So, Mr. Hernandez, how long have 1. on going to our university? Vir. Hernandez: Let me think about thatIquess I've been planning to go here since I was a Kid. Ms. Anderson: Oh, really? Mr. Hernandez: Yeah. It 2. to go here because it's the same university my parents and older sister attended. Ms. Anderson: |see. And why do you think you Would be a good fit for this university? Mr. Hernandez: That's an excellent question, but a little tough. I'm not quite sure how to respond. Ms. Anderson: Take your time. Mr. Hernandez: Wll, I've always been interested in technology, In fact, 3. been 2ende0 engineering classes at the community college since last summer. So, I think I'd be a good fit because my interests match this university's specialties. Ms. Anderson: |see. So, then, how do you plan to contribute to this university if you are accepted? Mr. Hernandez: To answer your question, I plan to commit my free time to the Robotics Association. And if | have a sufficient amoนnt of time left over, I've been planning to try out for the rugby team. Ms. Anderson: Oh, you play rugby? Mr. Hernandez: Yes, I've been playing since was in elementary school. I'm pretty good at it. Ms. Anderson: That's great. Next question: What do you plan on doing after university? Mr. Hernandez: 4. 1ve been thiทking Wor in the robotics field for a couple of years and then going to graduate school if the circumstances are right. Ms. Anderson: OK, then where do you see yourself in 10 years? Mr. Hernandez: No one has ever asked me that betore. In 10 years, I see myself working for a research institution. Ms. Anderson: Finally, what makes you unique? Mr. Hernandez: I've never thought about that before. I'm as unique as everyone else, I guess. I do have a talent for coming up with interesting ideas on how to use technology, and quite well. Besides that, I don't think I'm especially | 5. นnique. I'm just hard-working, and I have a passion to learn.

เพื่อนๆคนไหนพอจะทำได้มั้ยครับ ช่วยหน่อยครับ

Listen and complete the conversation with the words you hedr. 1-04 จls Anderson: So, Mr. Hernandez, how long have 1. on going to our university? Vir. Hernandez: Let me think about thatIquess I've been planning to go here since I was a Kid. Ms. Anderson: Oh, really? Mr. Hernandez: Yeah. It 2. to go here because it's the same university my parents and older sister attended. Ms. Anderson: |see. And why do you think you Would be a good fit for this university? Mr. Hernandez: That's an excellent question, but a little tough. I'm not quite sure how to respond. Ms. Anderson: Take your time. Mr. Hernandez: Wll, I've always been interested in technology, In fact, 3. been 2ende0 engineering classes at the community college since last summer. So, I think I'd be a good fit because my interests match this university's specialties. Ms. Anderson: |see. So, then, how do you plan to contribute to this university if you are accepted? Mr. Hernandez: To answer your question, I plan to commit my free time to the Robotics Association. And if | have a sufficient amoนnt of time left over, I've been planning to try out for the rugby team. Ms. Anderson: Oh, you play rugby? Mr. Hernandez: Yes, I've been playing since was in elementary school. I'm pretty good at it. Ms. Anderson: That's great. Next question: What do you plan on doing after university? Mr. Hernandez: 4. 1ve been thiทking Wor in the robotics field for a couple of years and then going to graduate school if the circumstances are right. Ms. Anderson: OK, then where do you see yourself in 10 years? Mr. Hernandez: No one has ever asked me that betore. In 10 years, I see myself working for a research institution. Ms. Anderson: Finally, what makes you unique? Mr. Hernandez: I've never thought about that before. I'm as unique as everyone else, I guess. I do have a talent for coming up with interesting ideas on how to use technology, and quite well. Besides that, I don't think I'm especially | 5. นnique. I'm just hard-working, and I have a passion to learn.

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10:19 ส. 3 ก.ค. จ84% e liveworksheets.com Exercise 2 : Nouns: Countable & Uncountable What did you buy? Use the pictures to write sentences (I bought .). 3 Toothpaste I bought some perfume, 4. hat and some shoes 2 [ bought 1 a pen, a flower, and a newspaper 3 4 Write sentences with Would you like a .. ? or Would you like some . ? 4 6 Would you ike some cheese? 2 Would you like 3 Would| 1 4 some coffee a cup of coffe ? 5 you like a biscuit ? 6 3 Write a/an or somc. book and listened to money. I want to buy 1 I read 4. Some 1วาusic. 2 I need food. 3 We met interesting people at the party. window to get only| Dfresh air. Japple and nice garden with 4 I'm going to open 5 Rachel didnt eat much for lunch big house. There's 7 I'n going to ทาake a table. First I need Jbread. |beautiful trees. 6 We live in WOod. 8 Listen to me carefully. Im going to give you paper and advice. Dpen. 9 | want to write a letter. I necd 4 Which is right? 1 I'm going to buy some new shoe/shoes. 2 Martin has got browin eye/eyes. 3 Paula has got short black hair/hairs. 4 The tour guide gave us some information/informations about the city. 5 We're going to buy soine 1new chair/chairs. 6 Were going to buy some new furniture/furnitures. 7 Its hard to find a work/job at the moment. 8 We had woonderful weather / a wonderful weather when we were on holiday. (shoes is right) ECLIVEWORKSHEETS Save for later Finish!

ช่วยหน่อยค่ะ ปึกอังกฤษจริงๆไม่ติงนัง

คือเรียน รายวิชาเพิ่มเติม csถนะการอ่าน 1 Mountain mummies Vocabulary 1 preserved volcano mummies sacrifices civilisation 1. Vesuvius is a famous Pompeii. 2. Thousands of years ago, many Egyptians were nmadeาก in Italy. In 79 AD, it destroyed the city of when they died. Sometimes they were buried inside pyramids. 3. Food can be for a long time by keeping it in a freezer. It will still be fresh many weeks later. 4. There have been lawS. books. music and art in China for thousands of years. It is a very old 5. used to be an important part of many religions. Often chickens, goats or cows were killed and offered to the gods. B. Choose the correct word or phrase with the same meaning as the blue words in each sentence. Very old highest point remaining parts of a destroyed building people who study objects from the past rOom 1. One day I'd like to climb Mount Everest. I hope I'Il be able to climb all the way to the summit. 2. Next to the king's bedroom was a small chamber for washing. 3. Tourists in Egypt like to visit ancient buildings such as the Great Pyramids. The pyramids were built many thousands of years ago. 4. Archaeologists found a lot of old bones buried underneath the church 5. After the fire, the family could not return to the ruins of their home In other words A. What is the main purpose of the passage? Circle 1, 2 or 3. the weather on volcanoes. แกre Sacrificed in the past. 4le BARน EXPLORATION && DISCOVERY

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1. ผิวหนังมีการหลั่ง lactic acid และ fatty acid ช่วยยับยั้งและทำลายเชื้อโรค " O ถูก 0 ผิด 2. น้ำตามีเอนไซม์อะไมเลส ทำหน้าที่ย่อยผนังเซลล์ของแบคทีเรีย O ถูก 0 ผิด 3. กระเพาะอาหารมีสภาพเป็นเบสไฮโดรคลอริก ทำลายเชื้อแบคทีเรียที่เข้าสู่ร่างกาย 0 ถูก 0 ผิด 4. ท่อลม มีการหลั่งสารเมือกเพื่อดักจับผุ่นละอองหรือเชื้อจุลินทรีย์แล้วถูกซิเลีย (Cilia) โบก พัดออกโดยการไอหรือการจาม " O ถูก ผิด 34 พ. 30 มิ.ย. 5. ช่องคลอดมีสภาวะเป็นกรดยับยั้งการเจริญเติบโตของเชื้อโรค" 0 ถูก O ผิด 6. เซลล์เม็ดเลือดขาวชนิดฟาโกไซต์ (phagocye) หรือ เซลล์กลีนกิน ทำ หนาที่กำจัดเชื้อโรค และสิ่ง แปลกปลอมด้วยการล้อมและกลืนกินพวกจุลินทรีย์และแบคทีเรีย โดยการยื่น ส่วน ทเี รียกว่า ซูโดโพเดียม หรือ เท้าเทียม " O ถูก O ผิด 7.T-cell ชนิด Helper T-cell [CD4+] ทำหน้าที่รับเชื้อโรคที่จับมาแล้วไปกระตุ้น B-cell หรือ CD8+ให้ทำงาน " O ถูก O ผิด 8. B-cell มีความจำเพาะต่อเชื้อโรค B-cell ชนิด plasma cell หลั่งแอนติบอดีไปฆ่าเชื้อ " O ถูก 0 ผิด

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Exercise 7 Read the following passage. Write the missing collective nouns in the blank spaces. Remember that sometimes there are two words you can use. Mom took Kate, Rudy and Derrick to the zoo. The zoo was very busy. A of people had gathered round the monkeys. One of the monkeys had a of bananas. Watching the monkey eat made the children feel hungry. Mom took a of bread and some of cheese out of the picnic hamper and everyone made sandwiches. After eating the sandwiches, the children had two of chocolate each. Rudy wanted to give one piece to a monkey, but the Zookeeper gave Rudy a very useful of advice. "Monkeys may look friendly, but sometimes they are very fierce," he said. 18