Một vòng dây dẫn tròn có diện tích 0,4m2 đặt trong từ trường đều có cảm ứng từ B = 0,6T, véc tơ cảm ứng từ vuông góc với mặt phẳng vòng dây. Nếu cảm ứng từ tăng đến 1,4T trong thời gian 0,25s thì suất điện động cảm ứng xuất hiện trong vòng dây là bao nhiêu?

bạn chỉ cần làm b1,b2,b3,5 thôi

Một hình vuông cạnh 5cm đặt trong từ trường đều có cảm ứng từ B = 4.10-4T, từ thông qua hình vuông đó bằng 10-6Wb. Tính góc hợp bởi véctơ cảm ứng từ và véc tơ pháp tuyến của hình vuông đó?

phân tích khổ thơ đầu của bài mùa xuân nho nhỏ ( tác giả Thanh Hải )

Tuổi của hai anh em hiện nay cộng lại bằng 14. Tuổi anh hiện nay gấp đôi tuổi em lúc anh bằng tuổi em hiện nay. Tính tuổi của mỗi người hiện nay

Hãy giải câu đố sau và xét từ quả được dùng với nghĩa gốc hay nghĩa chuyển. Quả gì không mọc từ cây lại cho cây mõ đó đây ngàn trùng không thơm nhưng biết quay vòng không ăn nhưng khắp bốn phương sống nhờ

Many health (1) believe that children and young people today are more (2) than they used to be. So why has this happened? One reason is bad eating habits. (3) of young people don’t have a healthy diet. They eat too much fast food (4) hamburgers and pizza and not enough fruit and vegetables. In the US, many children have been eating fast food (5) since they were very young. In fact, almost one-third of American children aged four to nineteen have been eating fast food (6) all the time. They also don’t (7) exercise and spend too (8) of their time watching TV, surfing the Internet or playing computer games. So how can you change your habits if you have been following an unhealthy lifestyle for a long time? First, change your (9) and eat more fruit and vegetables. Next, find an activity you enjoy. Why not try something different like rock climbing, surfing or hiking? Many young people have found that (10) fit and healthy can be a lot of fun.

Câu hỏi 1 5 điểm Complete the sentences using the words in the box. Sometimes, more than pne answer is possible 1. [ Lựa chọn ] although despite / in spite of However/Nevertheless beginning with a terrible disaster, the film has a happy ending. 2. [ Lựa chọn ] although despite / in spite of However/Nevertheless it was raining heavily, he went out without a raincoat. 3. [ Lựa chọn ] although despite / in spite of However/Nevertheless I heard the telephone ring, I didn't answer it. 4. I like the outdoors. [ Lựa chọn ] although despite / in spite of However/Nevertheless , I don't like bugs and dirt. 5. The film has a silly plot. [ Lựa chọn ] although despite / in spite of However/Nevertheless , many people enjoy it. 6. although despite / in spite of However/Nevertheless her fear, she wrapped her arms around him. 7. The sky was grey and cloudy. [ Lựa chọn ] although despite / in spite of However/Nevertheless , we went to the beach. 8. I went to see the film [ Lựa chọn ] although despite / in spite of However/Nevertheless feeling really tired. 9. Some English words have the same pronunciation [ Lựa chọn ] although despite / in spite of However/Nevertheless they are spelled differently like deer and dear. 10. My father is very busy. [ Lựa chọn ] although despite / in spite of However/Nevertheless , he's always willing to give a hand with the housework. Đánh dấu câu hỏi này Câu hỏi 2 5 điểm Rewrite the sentences using the words in the brackets. DO NOT change the given words in any way. 1. The new restaurant looks good. It seems to have few customers. (However) 2. My foot was hurt. I managed to walk to the nearest hospital. (although) 3. I've been too busy to answers my email. I'll do it soon. (Nevertheless) 4. I got very wet in the rain. I had an umbrella. (Although) 5. The story of the film was good. My mother didn't like the acting. (nevertheless) Mình sẽ cho 5 sao

Vietnamese food culture (1) by regions from the north to the south. In Northern Viet Nam, Vietnamese food is (2) by light and balanced flavours with the combination of many (3) Northerners have been using many kinds of meats like pork, beef, and chicken to cook; besides, some kinds of freshwater fish, crustaceans, and other mollusks like (4) , crabs, and oysters, etc. Many famous dishes of Viet Nam are cooked with these ingredients such as Bun Rieu, Pho, Bun Thang, Bun Cha, Banh Cuon, etc. Then food culture in Central and Southern Viet Nam has developed suitable (5) in each region. In Central Viet Nam, the regional cuisine of Central Viet Nam is famous for its spicy food, which differs from two other parts with mostly non-spicy food. Hue cuisine is typical Central Viet Nam’s food culture. (6) of Hue cuisine are decorative and colorful, which expresses the influence of the Vietnamese royal (7) in the feudal period. Food in the region is often decorated (8) and used with chili peppers and shrimp sauces, namely, Bun Bo Hue, Banh xeo, or Banh beo, etc. In Southern Viet Nam, the region is characterized by warm weather and fertile soil, which creates favorable conditions for planting a variety of fruit, vegetables and (9) . Thus, food in the region is often added with garlic, shallots and fresh herbs. Particularly, Southerners are favored of sugar; they add sugar in most dishes. Here, there is also an (10) of western and Asian cuisines on southern food, such as influences from China, India, France, and Thailand. Các từ gợi ý : sophisticatedly livestock ingredients characterized cuisine influence shrimps dishes flavors varies

Hãy nêu tên các bộ phận chính của hoa. Bộ phận nào quan trọng nhất? Vì sao? ko cần phải nêu chức năng hay đặc điểm nhé, chỉ cần nêu bộ phận chính thoai ak