Предмет: Физика, автор: BossSancez99

пружина под действием силы 1500 Ньютонов удлинилась на 3 сантиметров Определите жесткость пружины

Ответы

Автор ответа: Skanejom
0
F=k×x
1500H=k×0.03m
k=1500/0.03=50000 Н/м³

Автор ответа: BossSancez99
0
А если как то поподробнее.
Автор ответа: Skanejom
0
1 строка - закон Гука
Автор ответа: Skanejom
0
А дальше математические преобразования
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Exercise 2. Choose the right answer!



1.Why does your father read newspaper?

• general question

• special question

• alternative question

• Tag-question

• subject question

2. Did Alex went to the bookshop yesterday?

• general question

• special question

• alternative question

• Tag-question

• subject question



3. I watch Titanic tonight, don't you?



• general question

• special question

• alternative question

• Tag-question

• subject question



4. Who helps you to get up early?

• general question

• special question

• alternative question

• Tag-question

• subject question



5. Do you like to watch a film or to read a book?



• general question

• special question

• alternative question

• Tag-question

• subject question



6. ...... you seen Home Alone?

• is

• have

• do

• has

• can



7. What types of questions ...... you know?

• isn't

• may

• was

• do

• hasn't



8. ..... she reading a science fiction or a detective?

• is

• has

• do

• haven't

• are



9. Who ... watching TV at 7 p.m last night?

• is

• do

• has

• was

• haven't



10. It's an amusing book, ...... it?

• has

• is

• are

• isn't

• did



11. ..... your friend read a lot of books?



• do

• does

• have

• has

• can



12. ..... you ever seen this film?

• was

• is

• has

• have

• do



13. ..... do you prefer? - Romantic film.

• What

• When

• Where

• Why

• Who



14. .... was absent from previous lesson?

• When

• Why

• Where

• Who

• Was



15. They will return in a month,......

• are they

• do they

• aren't they

• won't they

• don't they



16. .... your brother like skating or skiing?

• Are

• Do

• Is

• Have

• Does



17. ... Tom been to the USA lately?

• Has

• Does

• Is

• Have

• Do



18. .... you go out last night?

• Do

• Have

• Did

• Are

• Has

19. ... are drinking tea now?

• When

• Where

• What

• Has

• Who



20. ... are you going now?

• Where

• Why

• Who

• What

• Have



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