Автомобиль массой 5 т движется со скоростью 72 км/ч. Какая работа должна быть совершена для - №26251710

Автомобиль массой 5 т движется со скоростью 72 км/ч. Какая работа должна быть совершена для его остановки?
- Предмет:
  Физика
- Автор:
  graces1ko
- 5 лет назад

Ответы 1

По закону сохранения энергии A=m*V^2/2=5*10^3*20^2/2=5*10^6 Дж=5 МДж
- Автор:
  max89
- 5 лет назад
- 0
Добавить свой ответ

Еще вопросы

А как разделить в столбик???
- Предмет:
  Русский язык
- Автор:
  cuddles5e8m
- 5 лет назад
- Ответов:
  
  1
- Смотреть
А1. This text __________ at the previous lesson.
1) translated
2) is translated
3) has translated
4) was translated
A2. Neither Kate nor her friends________ the game.
1) never play
2) don’t play
3) plays
4) play
A3. This is Tom’s room, _________?
1) isn’t it
2) isn’t this
3) isn’t there
4) it isn’t
A4. The Browns like their house. They ________it since 1997.
1) have
2) had
3) are having
4) have had
A5. What are your plans? When ___________ visit London?
1) are you going to
2) are you
3) do you
4) will you
A6. Jerry asked ____________ snow the next week.
1) it would
2) will it
3) if it will
4) if it would
A7. I don’t know if she __________me about it.
1) ask
2) asking
3) asks
4) will ask

A8. Do you like__________building at the end of the street?
1) this
2) these
3) that
4) those
A9. Boys, you’ll have to do everything _________.
1) yourself
2) yourselves
3) themselves
4) ourselves
A10. Tom is the best pupil. He ___________the best pupil in his class.
1) always
2) will be
3) has always been
4) was always
A11. He’s just built a tower, _____________ ?
1) isn’t he
2) hasn’t he
3) he isn’t
4) has he
A12. Bob won’t go there___________ .
1) neither
2) also
3) too
4) either
A13 I haven’t done my homework_____________.
1) already
2) yet
3) since
4) always
А14. Mary offers__________ some sandwiches.
1) make
2) made
3) to make
4) makes
A15. When I came in he ____________ to the teacher.
1) used to listen
2) listened
3) was listening
4) is listening

Часть 2
B1-B5. Прочитайте текст и выберите правильный ответ.

Learning foreign languages.
I am a student. I am a prospective teacher of biology. One of my hobbies is the English language. It is the most popular language on earth. Many people learn it in order to build a successful career or find friends abroad. As for me, I find this language one of the most beautiful in the world. That's why I decided to learn it. I like to listen to English songs. I am glad that I can understand what some song is about without anybody's help. I started to learn English at school and now I continue to learn it at the university. I often stay at the university after classes, because I am a member оf a research group. I like research work, that's why I often search for new information. Most of the articles of foreign colleagues are in English. New ideas in science happen so quickly, that it is impossible to translate everything into different languages at once. But I think it is very important to learn about new ideas as quickly as possible. My dream is to visit one of the English-speaking countries. I would like to communicate with its people and learn something new about its culture. But now I have some friends abroad. I can send letters to them via the Internet. Most of them are also students. We often discuss our plans for the future. I think young people are very much alike all over the world. And it is very interesting to learn a foreign language and be able to understand it.
B1. The author is a teacher of biology.
1) True
2) False
B2. The author started to learn English at the university.
1) True
2) False
B3. The author doesn't have any friends abroad.
1) True
2) False
B4. The author thinks that it is very interesting to learn a foreign language.
1) True
2) False
B5. The author likes research work.
1) True
2) False
- Предмет:
  Английский язык
- Автор:
  noemi
- 5 лет назад
- Ответов:
  
  1
- Смотреть
в автобусе 100 пас. 30чел.знают и немецкий и английский. 60 чел. низнают эти языки. 10 чел. знают только немецкий и 10чел. знают только английский задача на логику
- Предмет:
  Математика
- Автор:
  cason
- 5 лет назад
- Ответов:
  
  1
- Смотреть
через вершину прямого угла с , треугольника авс проведена высота сd . найти ав, если ас равно 10 см, аd равно 4см
- Предмет:
  Геометрия
- Автор:
  willie21
- 5 лет назад
- Ответов:
  
  1
- Смотреть

How much to ban the user?

1 hour 1 day 100 years