Giúp em 2 phần nay với ạ em dang gấp

Mn giup mình giải đề toán này với ạ!!!

Đưa một quả cầu nhiễm điện âm lại gần một cái cực như cũng nhận điểm âm thì hiện tượng gì xảy ra Giải thích

. Rút gọn rồi so sánh các phân số sau: a) 51/136 ; 60/108 ; 26/156 b) 165/270 ; 91/156 ; 210/1134 chi tiết giúp mình ạ. Hứa vote 5*, cảm ơn đầy đủ

Giúp em trả lời câu cuối ạ em cần gấp :(

(x/5)-(2/3)=0 có phải là phương trình bậc nhất 1 ẩn ko

viết đoạn văn ngắn khoảng 150 chữ bày tỏ suy nghĩ về trách nhiệm của công dân với tổ quốc. đừng mạng nha :<

Exercise 2: Rewrite the sentences using used to 1.My mum lived in a small village when she was a girl. → My mum .................................................................... 2.My parents lived in the USA when they were young. =>My parents ………………………………………… 3.We cycled to school two years ago. → We .......................................................................... 4.There did not use to be many traffic accidents before. → Now there are .......................................................... 5.My uncle was a bus driver some years ago, but now he has a desk job. → My uncle.................................................................. 6.Dennis gave up smoking three years ago. => Dennis…………………………………………….. 7.My brother had his hair cut short when he joined the army. =>My brother ………………………………………… Exercise 3: Choose the best answer: 1. I like coffee ___ I don't like tea. A. and B. but C. so D. because 2. I cannot swim ___ ski. A. so B. but C. or D. because 3. I want a new TV ___ the one I have now is broken. A. and B. but C. so D. because 4. I had to work on Saturday ___ I couldn't go to John's party. A. and B. but C. so D. because 5. My name is Jim ___ I'm your new teacher. A. and B. but C. so D. because 6. We live in the same building ________ we have hardly seen each other A. and B. although C. but D. so 7. I went to buy a Rolling Stones CD ________ the shop didn't have it. A. and B. but C. however D. so

tính diện tích hình vuông biết nếu tăng cạnh của nó thêm 50% thì diện tích mới là 193,5 cm vuông

Exercise 4: Give the correct forms of words 1. We often take part in many _________________ activities at school. (culture) 2. The Internet has helped students study more _________________. (effective) 3. I bought an _________________ book last Sunday. (interest) 4. We are worried that rivers and canals are becoming more and more ____. (pollute) 5. It is ______that some people poach fish in the Nhieu Loc Canal (disappoint) 6. The accident happened because he drove ________________. (care)