Предмет: Биология, автор: unknown8

Почему при повышении температуры тела расширяются а при понижении сжимаютя? помогите пожалуйста

Ответы

Автор ответа: davdog2
0
потому что их молекулярная решетка расширяется, соответственно они сами тоже расширяются, можно в кипяток положить металлический шарик и проверить на каком либо отверстии, в которое он спокойно пролезал, но при нагревании он пройдет туда с трудом. ;)
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Put the verbs between brackets in the past simple
1 . My sister ________ (invite) some friends for her birthday.
2. They________ (go) to the supermarket to do some Christmas shopping.
3. We ________ (spend) some time in the Alps last summer.
4. My friends________ (eat) in a very good restaurant yesterday evening.
5. He ________ (cut) himself while he was peeling potatoes.
6. American people ________ (celebrate) Thanksgiving not long ago.
7. They ________ (read) a very interesting article in the newspaper.
8. It ________ (rain) a lot this past last months, so there ________ (be) many floods in some parts of the
world.
9. My mother ________ (forget) to buy some toilet paper, so we ________ (have) to use tissues
yesterday !!!! Quite embarrassing indeed !!
10. We ________(write) an essay in French about freedom of speech.
11. I ________ (do ) the housework last weekend because Mum ________ (not/be) home , so I ________
(want) to help Dad.
12. My neighbours ________ (play) basketball with us in the square.
13. Sally-________ (listen) to Cold Play ‘s latest album when she ________ (be) at her friend’s last
weekend.
14. Bob ________ (buy) tickets for Sting’s concert and ________ (give) one to me three days ago.
15. The Chinese ________ (build) the Wall many centuries ago.
16. Charles Dickens ________ (write) « Oliver Twist » and many other books.
17. Abraham Lincoln________ (abolish) slavery in 1863.
18. My friends ________ (watch ) plenty of new videos last weekend.
19. Steve________ (book) a hotel for his summer holidays last week !
20. William the Conqueror________ (invade) England and he ________ (become) King there, he
________ (have) the Tower of London built, and people ________ (speak) French at the royal court at
that time.
21. Sandy ________ (take) part in « America’s got Talent » and she ________ (win).
22. My grandparents ________ (travel) a lot when they ________ (be) young, and ________ (visit) many
foreign countries.
23. My aunt ________ (teach) me how to knit last winter holidays .
24. The inhabitants of Berlin ________(destroy) the wall that ________ ( separate) the town in 1989.
25. I ________ (be ) there, and it ________ (be ) a moving experience, because many people
________(cry) as they ________ (get) reunited!
26. Jenny ________ (plant ) some trees in her garden last weekend.
27. Dave ________ (miss) his bus this morning so he ________ (run) all the way to work.
28. Sue ________ (sing) very well at the school show in June.
29. Some kids _____ (break) our wondows as they ________ (be) playing football in the street two hours
ago.
30. Sam _________ (lose) his wallet yesterday.