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nguyen3209
2 năm trước
Một chất điểm chuyển động trên trục Ox với gia tốc không đổi a = 4 m/s2 và vận tốc ban đầu v0 = -10 m/s. a) Sau bao lâu thì chất điểm dừng lại ? b) Tiếp sau đó chất điểm chuyển động như thế nào ? c) Vận tốc của nó lúc t = 5 s là bao nhiêu ?
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Trả lời câu hỏi giúp mk ạ! VIII. Read the selection and answer the questions Nabil Hamade was born in Beirut, Lebanon, but now works as an electrical engineer in Dubai. He picks up nails off Dubai’s roads on his morning jog. keeping the city’s roads safe and free of sharp-edged items is part of his conservation vision. [A] His passion is to save energy. He picks up any nail he sees lying on the road. In fact, one morning not so long ago, he ended up picking up forty nails. Nails are usually found on construction sites and market places. [B] Sometimes his friends tease him about his collection of nails, but they also respect him for being a good citizen by caring for the environment. One friend says, “After I had four tire punctures last year, I realized there was a purpose to Hamade’s effort to make a change”. [C] He has had many bad experiences with punctured tyres because of nails that catch the tyres. He feels that by preventing which could cause accidents, he can reduce harm to people and even deaths. He has calculated that it takes about a quarter barrel of crude oil to manufacture a medium-sized car tyre. If he can reduce the number of tyres that have to be manufactured, he can help save energy. He estimates that the electricity used to produce and recycle five tyres could provide power to a one-bedroom apartment for a month. [D] Nabil collects the nails which he plans to give to an artist to make a sculpture. It will send out a clear message about the environment: Be active. Find something you want to be responsible for and do it. That will make all the difference. 1. The best title for this article would be…………………………………………………. a. punctured tyres b. nails on the road c. The joy of running d. making a difference 2. Nabil Hamade follows a career in…………………. a. sport b. business c. engineering d. construction 3. What motivates Nabil to pick up nails? a. He wants to save energy b. He wants to use them at work c. He wants to make a sculpture d. He wants to give them to his friends 4. The word passion in paragraph 2 is a a. verb b. adverb c. noun d. adjective 5. According to the text, Nabil’s friends respect him because…………………………. a. he collects nails b. he is an engineer c. he jogs five times a week d. he cares for the environment 6. The word purpose in paragraph 3 means………………. a. goal b. way c. certainly d. difference 7. The opposite of the word harm in paragraph 4 is…………………… a. fix b. make c. hurt d. damage 8. The word active in paragraph 4 means a. lively b. calm c. noisy d. damage 9. Based on the passage, which of the following adjectives best describes Nabil Hamade? a. lazy b. selfish c. relaxed d. motivated 10. In which paragraph could the following sentence fit best? “He does this five times a week to train for a marathon” a. Paragraph A b. paragraph B c. Paragraph C d. paragraph D 11. Which of the following details about Nabil is not mentioned in the text? a. His age b. His nationality c. Where he works d. Why he collects nails

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