hòa tan hoàn tòan2 12,1 gam hỗn hợp Zn và Fe vào dung dịch axit HCl dư thấy có 4,48 lít khí thoát ra ngoài ở đktc và dung dịch X. cô cạn dung dịch X thì thu được bn gam muối khan

Quãng đường AB dài 30km .Một người đi xe đạp dự định đi từ A đến B trong thời gian nhất định .Do đường khó đi nên người đi xe đạp đã đi với vận tốc bé hơn dự định 5km/h và đã đến B muộn hơn dự định 1 giờ. Tìm vận tốc dự định ? GIÚP MIK VỚI NHANH NHÉ!

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III. Điền đúng dạng so sánh của tính từ trong ngoặc: 1. The country is than the city, (quiet) 2. I'm as……….…………..as my sister .(tall) 3. The math book is than the history book, (thick) 4. Which is the ……………city in your country ? (big) 5. The town isn't very clean. The country is (clean) 6.Is Mr Nam than her father ? (rich) 7. Is your kitchen ……………….……than my kitchen ? ( big) 8. My brother is as………………….……… than I am. ( busy) 9. Your house is (large) ………………………than my house. 10. Jane is (beautiful)……………………………………….……… than her sister. 11.Tokyo is (big)………………..…. than London. 12. The Mekong River is (long)…………….. than the Red River. 13. Nobody is (happy) …………………… than Miss Snow. 14. Benches are ( comfortable) ………………………………… than arm- chairs. 15. Nam is (fat)……………………..……. in my class 16. Her English is (good)………………………………………… than my English. 17. A new house is(expensive)………………………………………..… than an old one 18. My television is (modern)…………………………………………. than his television. 19. His joib is( important) ………………………than mine. 20.Maths is ( difficult)……………………………………….subject of all. 21. The City is (noisy)…………………. than the country. 22.Mary is (pretty) ……………………of the two students. 23. A new house is (expensive) …………………… house on the street. 24. Of the four ties, I like the red one(well) ……………………. 25.Jonh is much( strong) …………………… than I thought

Từ điểm M có độ cao so với mặt đất bằng 0,8m ném lên một vật với vận tốc đầu 2m/s.Biết khối lượng của vật bằng 0.5kg,lấy g=10m/s bình 1)Tính vận tốc vật ngay trước khi chạm đất? 2)Ở độ cao nào thì động năng bằng thế năng?

Điền vào chỗ trống Khong có hình đâu trả lời hộ nhé :3333

Cho tam giác ABC vuông tại A có AB=18cm, BC=30cm. Vẽ Ah vuông góc với BC tại H. Tính độ dài AH.Câu nào sau đây đúng: A. AH=14,4cm B. AH=15,4cm C. AH=16cm D. A,B,C đều sai

GIÚP EM VS Ạ :< UNIT 9 1. Marine plants and animals fall into three _____________ groups. (majority) 2. John’s father is a marine _____________. He studies life in the sea. (science) 3. The legal system operates very _____________ in the US and Britain. (differ) 4. The ________ was solved when the police discovered the murder weapon. (mysterious) 5. There is a wide _____ of opinions on sea food cultivation. (vary) 6. Hundreds of species of marine life manage to survive even in the darkest _________ of the ocean (deep) 7. The whale is a (n) __________ species. (danger) 8. Oil spills are a great ______ to the undersea world. (threatened) 9. Human beings are destroying ________ habitats of many species of animals. (nature) 10. Sperm whale populations are at risk due to hunting and their accidental ______ in fishing nets. (entrap) 11. The company needs to reduce its _______ on just one particular product. (dependable) 12. My grandpa's attitudes are very _______, considering his age. (modernization) 13. You've got to try to keep _______ as you grow older. (act) 14. He would never do anything to _______ the lives of his children. (endangered) 15. The sea bed _______ here to 5000 meters (deep) UNIT 10 1. The world's rain forests must be safe from_____________ (destroy) 2. Major steps are being taken to control the __________________ of beaches. ( polluted) 3. Water_____________________ is necessary for hydropower stations. (conserve) 4. People are_____________________ doing harm to the environment. (constancy) 5. The government has made no attempt to reduce soil ________________ (erode) 6. He stressed the need to pass a law in nature’s____________________ (defender) 7. Many species of plants and animals have been virtually_____________________. ( elimination) 8. Trees, grasses, and other plant life play an important part in ____________________the natural of water. (circulate) 9. Modern farming practice has led to the virtual __________________of this bird. (appear) 10. The giant panda is an ______________________species. (danger) 11. In the movie, he plays a concerned and _______ father trying to bring up two teenage children on his own. (sense) 12. As a child I had an _______ friend called Polly (imagine) 13. Phone me if there are any new _______. (develop) 14. If you don't have anything _______ to say, I'd rather you kept quiet. (constructors) 15. A healthy body will be able to fight off the illness _______ without the use of medicine. (naturalize)

Bài 6 : Tìm x,y,z biết : -4/8 = x/-10 = -7/y = z/-24

Nhanh 2 bài này đi ạ !>.