Определи правильные и неправильные утверждения о линейной скорости криволинейного движения. Направлена по направлению движения тела, по касательной к окружности.

Направлена против движения тела, по касательной к окружности.

Направлена вдоль радиуса окружности к центру окружности.

Направлена вдоль радиуса окружности от центра окружности к дуге окружности.

Вектор скорости перпендикулярен радиусу окружности

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Ответ:

koroleva1858

30.01.2022

верно, неверно, верно, неверно, верно.

4,8(44 оценок)

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Ответ:

Ofsi

30.01.2022

. Today English is the language of the world. It is only in the course of the last hundred years that English has become a world language. In Shakespeare's time it was a «provincial» language of secondary importance with only 6 million native speakers. . Nowadays over 300 million people speak it as a mother tongue. English is the official language of the United Kingdom of Great Britain and Northern Ireland, of the United States of America, of Australia and New Zealand. . It is used as one of the official languages in Canada, the Republic of South Africa and the Irish Republic. English is also spoken as a second language in the former British and US colonies. In a number of speakers (400 million) it is second only to Chinese. English is the major international language of communication in such areas as science, technology and business. It is the language of literature, education, modem music, and international tourism. English is the major language of diplomacy, it is one of the official languages of the United Nation organization and other political organizations. Russia is integrating into the world community and the problem of learning English for the purpose of communication is especially urgent today. . One should say that English is not an easy language to learn. There is a big problem of spelling, of the large number of exceptions to any rule. This language is very idiomatic and the prepositions are terrible. . English is one of those languages which may seem easy in the beginning, but then the bridge between basic knowledge and mastery takes a long time to cross. . But if you cross this bridge it will give you great satisfaction. You will be able to speak to people from other countries, to read foreign authors in the original, which makes your outlook wider. To know English today is absolutely necessary for every educated man, for every good specialist.

4,4(72 оценок)

Ответ:

dbonapik

30.01.2022

1. 1. …English is a…world language. 2. I study…English. I attend English classes in the…evening. On…the days when I have no…classes, I stay at…home and do some work about…the house. I have…dinner with my…family. After…dinner I talk to…members of my…family, watch…TV and read…books,…newspapers and…magazines. I go to…bed late at…night. 3. I am thirsty. Give me…water, please. 4. There is a…book on the…table. Give me…the book,please. 2. 1. Please, be quiet. I (am working) 2. Look at Sue. She (is wearing) her new hat. 3. The weather is nice at the moment. It (is not raining) now. 4. Where are the children? They (are playing) in the park. 5. (on the phone). We (are having) dinner now. Can you phone again later. 6. You can turn off the television. I (am not watching) it. 3. 1. Don’t tell… anybody about it. 2. Life is tough! … everybody has problems. 3. I think, everybody …in our class is honest. 4. … somebody left a magazine in our classroom yesterday. 5. Is there… anybody here who knows French. 6. You must find … somebody who can help you. 7. … nobody knew anything about America before Columbus discovered it. 8. Is there… anybody in the office? 9. There is… nobody in the next room. 10. Please tell us the story. … nobody knows it. 11. … anybody can answer this question. It is very easy. 4. Has worked, has written, has made, has met, has learnt, has rung, has taken, has brought 5. 1. Water (boils) at 100 degrees Celsius. 2. The moon (goes) round the Earth. 3. I usually go to work by car. 4. Julia (is) very good at languages. She (speaks) 4 languages very well. 5. The River Nile (flows) into the Mediterranean. 6. 1. make …discovery 2. do … harm 3. make … a promise 4. make … certain 5. do … damage 6. make … an attempt 7. make … a plan 8. make … an excuse 9. do … better 10. do … their best

4,6(46 оценок)

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