Giải giúp em bài 4,5 với ạ E đang cần gấp ạ

1 bếp điện gồm 2 điện trở R1 và R2 Với cùng 1 hđt nếu dùng điện trở R1 thì đc ấm sôi sau thời gian t1=15 phút nếu dùng điện trở R2 thì nước sôi trong thời gian 30 phút nếu dùng điện trở ấm sẽ sôi nếu dùng cả 2 điện trở trg 2 trường hợp: a. mắc nối tiếp b. mắc //

Bài 5 làm như thế nào ạ. Em cảm ơn

mik cần gấp ạ ;))))))))))))))))))))))))))

1. Complete each of the following sentences using the cues given. You can change the cues and use other words in addition to the cues to complete the sentences. Here is an example. 0. Ngoc/ usually/ play/ badminton/ Sunday. Answer: 0. Ngoc usually plays badminton on Sundays. 1. Noise pollution/ big cities/ lead/ hearing/ problems. 2. Lots/ aquatic animals/ die/ because/ oil spills. 3. If/ you/ president/ country/ what/ you/ do/ protect/ environment? 4. One way/ save/ environment/ is/ use/ renewable/ energy/ sources. 5. This boy/ suffer/ birth/ defects/ because/ parents/ expose/radioactive/ pollution.

Cho a, b > 0. a+b ≤1. Tìm GTNN của biểu thức: P = a² + b² + $\frac{1}{a^2}$ +$\frac{1}{b^2}$

làm cho mình avatar hình rồng đỏ nhé

1. It is over two years since they left their homeland. (They haven’t …………………………) 2. “How many cars are there in front of your house, Mai?” I said (I asked …………………...) 3. No one introduced me to newcomers in the festival. (I ……………………………………..) 4. The food was too bad for the children to eat. (The food was so ……………………………) 5. It’s no use persuading her to join in that activity. (There is no ……………………………..) 6. I am on the fifth page of the essay I am typing. (So far ……………………………………) 7. The dog keeps stealing my socks. (The dog is ……………………………………………...) 8. Hoa found it easy to translate this poem into French. (Hoa had no ………………………..) 9. Collect all of dirty clothes by 8 o’clock tomorrow morning. (Let all ………………………) 10. Mary is the most graceful girl at school. (No girl …………………………………………..)

mình hỏi sao chảng có ai chả lời

GIÚP MÌNH VỚI Ạ!!!GIẢI CHI TIẾT NHA!!CẢM ƠN