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1. Плачучи, вона повернулася в будинок.
2. Центральний кут-це кут, утворений двома радіусами.
3. Дівчина показала нам групу жінок, що сиділи в кутку кімнати.
4. Коли його хвалили, він почував себе ніякого.
5. Маргарет вважала себе обманутою.
6. Якщо дозволить погода, ми проведемо вихідний день у лісі.
7. Він увійшов до кімнати з усміхненим обличчям.
8. Увійшовши до кімнати, вона побачила там свою сестру.
9. Оскільки лист був написаний олівцем, його було важко читати.
10. Вас сфотографували?
10. Choose the correct verb forms (-ing form or Infinitive). If two answers are possible, put both.
Dear Dennis, We just wanted (a) say/to say/saying thank you for putting us up before we caught the plane last week. It was a lovely evening, and we enjoyed (b) meeting/to meet/meet your friends, Pete and Sarah. We managed (c) get/getting/to get to the airport with plenty of time to spare. We even tried (d) getting/to get/get an earlier flight, but it wasn’t possible. We had a wonderful holiday in Spain. We just loved (e) driving/to drive/drive through the countryside, and we often stopped (f) walk/walking/to walk round a mountain village. We met our friend, Bill and Sue, and they invited us (g) having/to have/have a meal with them. They wanted (h) that we stay/us to stay/we to stay with them, but we couldn’t, as we had already booked a hotel. The weather was fantastic. The sun didn’t stop (i) shining/to shine/shine all the time we were there. Leaving Spain was very sad. It made me (j) want/wanting/to want to cry. Anyway, we’re looking forward to hearing from you, and hope (k) see/to see/seeing you soon. Let us (l) to know/knowing/know if you’re ever in the area. You must call in. Best wishes Sandra |
II семестр
Baріант № 7
Read and translate the text.
Power
Power is another term used in a special technical sense in speaking of machines. It is the rate or speed at which work is performed. If you raise a ten-pound weight a distance of twenty feet in two minutes, you are performing work at a rate of ten pounds X twenty feet x two minutes, or two hundred foot- pounds in two minutes. Since the rate is usually given in units of one minute, this is a rate of 100 foot-pounds in a minute.
In the English-speaking countries, the rate of doing work is usually given in terms of horsepower, often abbreviated hp. You will remember that this expression resulted from the desire of the inventor James Watt to describe the work his steam engines performed in terms that his customers could easily understand. After much experimentation, he settled on a rate of 33,000 foot-pounds per minute as one horsepower.
In the metric system power is measured in terms of watts and kilowatts. The watt is the power to do one joule of work per second. The joule is a small unit of work, approximately three-quarters of a foot-pound. One horsepower is equal to 746 watts. The kilowatt, a more widely used term, equals a thousand watts or approximately IVs horsepower in the English system. The newton is a unit equal to the force necessary to accelerate one kilogram one meter per second per second.
We are used to hearing the words watt and kilowatt in connection with electricity but we must remember that from a scientific viewpoint any kind of power can be quantified in the same terms. It is the work rather than the source of energy which is important; watts and kilowatts are used to measure power that results from mechanical as well as electrical energy.
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Work and force | | | Translate into English using the infinitive. |