Вопрос школьника по предмету Физика
На какую высоту поднимается нефть по вертикальной трубе, если давление созданное насосом у основания труби равно 320 кПа.
Ответ учителя по предмету Физика
По формуле
p = ρ*g*h
находим h:
h = p / (g*ρ) = 320 000 / (10*800) = 40 м
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Распишите всё как в тетради
I. Change the sentences into the Past Simple. Use the words yesterday, last week, two days ago.
1. He comes to school in time. 2. I say her “Good-bye”. 3. My sister goes to London by train. 4. Kate sees Mary every day. 5. We take our relatives to the airport. 6. My Mum tells us fairy-tales every evening. 7. They choose the right answer in the test. 8. My parents find a lot of mushrooms in the forest. 9. We meet our friends every Sunday. 10. Paul knows the English history very well.
II. Answer the questions.
1. Was there a supermarket in your town three years ago? 2. How old were you when you read your first book? 3. What did you do yesterday at 8 p.m.? 4. When did you come to school today?
III. Make questions from these words. 1. walk, her dog, she, did, yesterday? 2. buy, they, did, what, last month? 3. we, where, eat, did, pizza? 4. she, did, tell, him, a secret? 5. what, he, did, say?
IV. Put questions to the underlined words. 1. I wanted to buy a nice Christmas present for my Mum. 2. The boy read an interesting book yesterday. 3. Bill chose the biggest apple in the basket. 4. This little girl looked like her mother. (…or…) 5. Alice closed the window in her bedroom, (не так ли?) 6. James took his little brother to the Zoo last Wednesday.
V. Put in is, are, was, were. 1. There ___ no pupils at school yesterday. 2. There ___ much chocolate ice-cream at home. Can I have it. 3. There ___ a lot of hungry kittens under my table. Give them milk, please. 4. What ___ there in your school bag yesterday? 5. ___ there much fish in the fish soup? – Yes, there ___ a lot. 6. ___ there any baby crocodiles in the Zoo last year? – Yes, there ___ five. 1. How many seasons ___ there in a year? 2. What ___ there in your hand? – It’s a big carrot. 3. There ___ no stadiums in London a long time ago. 4. There ___ no snow last winter.
VI. Translate from Russian into English. 1. Мой друг помогал маме по дому вчера. 2. Что ты читал вчера вечером? 3. Я ездила в Киев в прошлом году. 4. На тарелке большое яблоко. 5. В парке не было детей. 6. В вашей комнате много интересных книг? 7. Вчера дома не было молока. 8. Ты ходил в школу вчера? 9. Вчера Мэри не выполнила домашнее задание. 10.Вы отмечали Halloween в прошлом году?
VII. Correct the mistakes. 1. What there is in the room? 2. There is a lot of apples on the table. 3. You wanted to have some juice yesterday? 4. Where did you went to swim yesterday? 5. There isn’t no water in the glass. 6. There wasn’t presents for you last Christmas! 7. We not watched TV at school yesterday. 8. Do your father went to the party with you yesterday? 9. Are there some apples on the table? 10. Are there many boys in the house? – Yes, there are not.
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