Bài 1.Từ độ cao h=20m thả rơi tự do vật nhỏ tại nơi có g=10m/s^2 C1.Xác định quãng đường ,vận tốc vật đạt được trong giây đầu tiên C2.Xác định thời gian vật rơi ,vận tốc của vậtngay trước khi chạm đất C3.Tính quãng đường vật rơi trong giây cuối cùng

Hoàn thành bảng về các cuộc cách mạng tư sản đã hok ( 4 cuộc cách mạng tiêu biểu: Hà Lan, Anh, chiến tranh giành độc lập 13 bang thuộc địa, Pháp) cái này thôi BẢNG stt|thời gian |Lãnh đạo |tên cách mạng |Hình thức |Kết quả| 1

Cho $ΔABC$ vuông tại $A$. Tia phân giác của $\hat{B}$ cắt cạnh $AC$ tại $D$. Trên cạnh $BC$ lấy điểm $H$ sao cho $BH = BA$. $a)$ Chứng minh $DH ⊥ BC$ $b)$ Giả sử $\hat{C} = 90^o$. Tính số đo $\widehat{ADB}$ Các chuyên gia giúp em nhé!

Complete the second sentences so that it has the same meaning as the first. Cần gấp lắm ạaa nhanh nhanh giúp emmm

câu chuyện những vết đinh muốn nói đến điều gì

cho m gam KOH vào 400ml H2SO4 0,2M thu được dung dịch X. tính m khi dung dịch X có ph=3

Làm đầy đủ giúp mik nhé hơi nhiều một chút T.T So/SUCH...THAT, TOO...TO, ENOUG... 1. Rewrite using "too...to" or "enough...to". This road is too dangerous at night This road is not ndgt safe de walk ol nign 2. The lesson was not interesting enough. The lesson was 3. Our car is not big enough for all of us to travel. Our car is 4. Peter is too lazy to get promoted. Peter is not 5. She is not old enough to live on her own. She is 6. He is too short to play basketball. He is not 7. They are not rich enough to afford a holiday. They are 8. The wall was too high for them to climb. The wall was not II. Combine these sentences, using "too/enough...to" 1. The children are very excited. They can't wait to open their presents. 2. They are experienced. They can apply for the job. 3. Jennifer is very careless. She can't take care of her baby sister. 4. The presentation of the book was very boring. We couldn't attend it. 5. The supermarket is near. We can go on foot. 6. She was very angry. She couldn't speak. 7. These shoes are comfortable. You can wear them all day long, III. Combine these sentences, using "so/such...that" 1. Jim gave a good explanation. Even Bob understood the lesson. 2. The painting is valuable. It has to be kept locked up. 3. He plays music well. He is always in demand at parties. 4. My house is a long way from here. We'll need two hours to reach it. 5. The TV programme was good, We all enjoyed it. IV. Rewrite the sentences with "SO" instead of "SUCH" or "SUCH" instead of 1. The weather is so cold today that we can't go on a picnic. Yasmin is so beautiful that everybody is jealous of her. 3. It is such a pretty dog that I'd like to take it to my house. 4. It was such a nonsense game that Arda couldn't understand it. 5. John is so honest that everybody trusts him. 6. It is such an exciting book that I-can't put it down. 7. Istanbul is such a crowded city that I can't live there for a long time. 8. We had such little time that we went there by bus. 9. The dogs are such clever animals that they can understand everything yuu said. 10. My room is so big that I can call all my friends V. Combine the sentences. ) My grandfather is very energetic. He can run ten miles. (so ... that) 2) She was late, She couldn't have breakfast, (too) 3) Rafael is a talented tennis player. He can win all the tournaments. (sueh ... that) 4) Laura is very young. She can't drive a car. (enough) 5) The ganden is very big. We can plant lots of trees and flowers there. (so ... that) 6) It is very cold. We cannot play outside. (too) 7) Helen isn't short. She can wear that dress. (enough) 8) Slie hasn'i got much amoney. She can't go to Madzid. (onough) 9) Everybody was very excited. They couldn't wait the announcement. (so .. that) 10) George is an extravagant man. He buys whatever he sees. (such .. that) 11) Mag is lovely. She has many friends. (so ... that) 12) Samantha is a shopaholic girl. She spends all her time to do shopping. (such ... that) 13) Amber is so hardworking that she can pass all the tests she has. (such ., that) 14) Arthur is too sleepy to finish his work. He can't do it, (so .. that) 15) My father is young enough to play football. (too) 16) Margaret's dress was so long that she couldn't walk. (such ... that) 17) The girls were so exhausted that they couldn't eat their meal. (too) 18) We didn't have enough courage to open the door of the haunted house. (too) 19) It was such an old car that I thought it would fall apart. (so ... that) 20) The students were too reluctant to solve the problems. (enough)

feso4 + nacl có tác dụng không? VÌ SAO?

MN giải hộ iem bài này ý : d)M là trung điểm của HK ạ

Tìm x;y;z biết:2x bằng 3y bằng4z-2y và x+y+z bằng 45