viết công thức cấu tạo và đặc điểm cấu tạo phân tử của etilen (giúp em với ạ)

Topic 5. The media - What’s your favorite type of media? Why? - Tell some advantages and disadvantages of the Internet. - What do you use the Internet for? - Why do people use the Internet? - Tell some benefits of TV. - Do you like watching TV/reading newspaper and magazines/ listening to the radio/ using the Internet? - How many hours a day do you spend watching TV/…/using the Internet? - What programs do you like or dislike? Why? - Tell some famous programs on TV. 

Topic 4: Learning a foreign language - Do you like learning English? Why? - When did you start learning English? - How long have you been learning English? - How do you learn English? - What aspect of learning English do you find most difficult? - What should you do to improve your English? - How will you use English in the future? - Do you speak any other languages? - Which school/ language center would you like to go? Why? 

 Topic 3 : A trip to a countryside - Where is your home village? - How far is it from the city? - How can you get there? - How long does it take to get there? - What do people do for a living in your village? - Does your village have a river, a lake, a mountain,…? - Are there any places of interests to visit there?  

Topic 2 : Clothing - Should lower secondary school student wear uniform? Why or why not? - What do you usually wear on the weekend?

Topic 1 : A visit from a pen pal - Do you have any pen pal? - How often do you write to each other? - What do you like the most about him or her? - What do you know about Malaysia? Topic 2 : Clothing - Should lower secondary school student wear uniform? Why or why not? - What do you usually wear on the weekend? Why do you wear them? - What is your favorite type of clothing? Why? - What do you often wear on special occasion? - What kind of clothes do you dislike? Why? - Do you like wearing ao dai? Why or why not? - Do you like wearing jeans? Why or why not? Topic 3 : A trip to a countryside - Where is your home village? - How far is it from the city? - How can you get there? - How long does it take to get there? - What do people do for a living in your village? - Does your village have a river, a lake, a mountain,…? - Are there any places of interests to visit there?  Topic 4: Learning a foreign language - Do you like learning English? Why? - When did you start learning English? - How long have you been learning English? - How do you learn English? - What aspect of learning English do you find most difficult? - What should you do to improve your English? - How will you use English in the future? - Do you speak any other languages? - Which school/ language center would you like to go? Why? Topic 5. The media - What’s your favorite type of media? Why? - Tell some advantages and disadvantages of the Internet. - What do you use the Internet for? - Why do people use the Internet? - Tell some benefits of TV. - Do you like watching TV/reading newspaper and magazines/ listening to the radio/ using the Internet? - How many hours a day do you spend watching TV/…/using the Internet? - What programs do you like or dislike? Why? - Tell some famous programs on TV. (giúp em trả lời đống câu hỏi này với ạ, em đang cần gấp lắm ạ, em cảm ơn)

Để chế tạo bếp điện dùng với hiệu điện thế 20V. Người ta lấy dây dẫn dài 15m. Điện trở suất 0.4.10^-6Ωm. Tiết diện 0,1mm² để làm bếp

a. Công suất của bếp

b. Nếu đun nước từ 20 độ C đến 90 độ C thì trong 10 phút khối lượng nước đã đun là bao nhiêu biết hiệu suất đạt 70 phần trăm (giải giúp em với ạ, em đang cần gấp)