-
Цемент 2800
Фарфор 2300
Стеклопластик 1900
Слюда 3200
Свинец 11400
В таблице даны плотности некоторых твёрдых веществ. Если вырезать из этих веществ сплошные (без полостей внутри) кубики, то какие кубики будут плавать в керосине? Плотность керосина — 2700 кг/м3
дам 5оо баллов. пожалуйста помогите срочно-
Предмет:
Физика -
Автор:
josefinapgbb - 5 лет назад
-
Ответы 2
-
спасибо
-
Автор:
chazhuerta - 5 лет назад
-
0
-
-
Стеклопластик и Фарфор. У них плотность меньше чем у керосина. значит он будет выталкивать их на поверхность.
-
Автор:
lucaloul - 5 лет назад
-
0
-
-
Добавить свой ответ
Еще вопросы
-
Fill in the blanks using the verbs in brackets in the past simple, past continuous, past perfect or past
perfect continuous.
1.-They……………………………….. (not be) to the zoo until their teacher……………………………….. (take) them
in one of their science lessons.
2.-While we ……………………………….. (look) at a shop window a car……………………………….. (crash) into a
street lamp. The police ………………………….. (arrive) immediately and an ambulance ………………..………..
(take) the driver to hospital.
3.-She ……………………………….. (say) she ……………………………….. (never/ ride) a bike before her parents
……………………………….. (buy) her one for her 14th birthday.
4.-Alan ……………………………….. (give) me back the book last Sunday and ……………………………….. (tell) me
he……………………………….. (enjoy) it very much.
5.-He ……………………………….. (look) for a job for over two months till my father…………………………..
(offer) him the post of accountant in his factory.
6.-We ……………………………….. (not contact) Sue although we ……………………………….. (phone) her the
whole morning. Later we ……………………………….. (find) out she ……………………………….. (go) to London with
her mum. She ……………………………….. (want) to buy some clothes as one of her friends …………………………
(invite) her to her birthday party.
7.-Mum ……………..……………(do) the housework since she ………..…..… (get) up early in the morning and
……………………………(not finish) by the time I …………………….. (arrive) home from university.
8.-Mary ……………………………….. (finish) the project she……………………………….. (have) to do for her
history class while she ………………………………….……….. (download) some mp3 files from the Internet.
9.-When I ………………………………….….. (get) off the plane it………………………..………….. (rain) and a man
………………………….. (comment) it…………………………….. (rain) since the beginning of the week. Fortunately,
the next day it………………………….. (stop) and the sun………………………….. (shine) till the day of my return.
10.-He……………………………..……….……..(study) very hard since the beginning of the last term at University
and……………………….. (manage) to pass all the exams with very good marks. His parents ………………….……..
(get) very happy. Two week after he……………………………….. (finish) his exams, they………………………………..
(give) a big party to celebrate it. They……………………………………..…….. (invite) all their relatives and friends.
11.-When Elisabeth………………………………….…………….. (switch) on the TV set, her favourite series
…………...............……………… (already/ start). When it………………………………………….….. (finish),
she………………………. (call) her friend Sue to ask how the episode…………………………….….
(begin) that day.
12.-Everybody………………………..…………(dance) and …………………..……………….. (drink)
when I……………………………….. (leave) the disco at midnight. As it………………………..………..
(not rain), I……………………………….. (decide) to walk back home. I…………………………..………..
(walk) about 200 metres, when a terrible storm……………………………………………..….. (begin). I
………………………….……….. (run) to the nearest café and………………………….………………..
(wait) there till the rain ………………………………..……………….. (stop).-
Предмет:
Английский язык -
Автор:
queenypjr - 5 лет назад
-
Ответов:
1 -
Смотреть
-
-
помогите найти дискриминацию корней квадратного уравнения х-6х-7=0 х - 8х+12=0
-
Предмет:
Алгебра -
Автор:
thunder thighs - 5 лет назад
-
Ответов:
2 -
Смотреть
-
-
Различия в освоении территории Ирана
-
Предмет:
География -
Автор:
ximenaqr1o - 5 лет назад
-
Ответов:
1 -
Смотреть
-
-
Complete the sentences with the correct form of
the verbs. Use Past Simple, Past Continuous, Past
Perfect or Past Perfect Continuous.
1. My dad ___________ (drink) his morning
coffee before I ___________ (get up)
yesterday.
2. I ___________ (read) a magazine when
someone ___________ (ring) at the door.
3. The pupils ___________ (talk) loudly when the
teacher ___________ (come) into the
classroom.
4. He ___________ (wash) the car for an hour
before I ___________ (come) to help him.
5. What ___________ (Jack/do) while his little
brother ___________ (play) with his Lego
blocks?
6. By the time Mick and Sally ___________
(reach) the railway station , the train
___________ (leave).
7. We ___________ (clean) the bathrooms
yesterday.
8. It ___________ (rain) when I ___________
(go) to school last Monday.
9. After I ___________ (cook) dinner, I
___________ (have ) a nap.
10. Seth ___________ (ride) his bike when he
___________ (fall) off and ___________
(hurt) his arm.
11. ___________ (you/borrow) 200 € from Phil
before you ___________ (buy) a new laptop?
12. Melisa ___________ (work) as a nurse for
thirty years before she ___________ (retire)
last year.
13. Before Steve ___________ (go) to bed, he
___________ (take ) a long shower.
14. I ___________ (jog) in the park yesterday
morning when I ___________ (see) Kate.
15. What ___________ (George/do) at nine o’clock
last night?
16. First she ___________ (get) dressed and then
she __________ (put) on make-up.
17. Last summer Frank ___________ (work) in a
French restaurant to save some money for a new
car.
18. Where ___________ (you/go) when you
___________ (see) the accident?
19. They ___________ (listen) carefully while the
teacher ___________ (explain) the theory of
relativity.
20.Before we ___________ (go) on holidays, we
___________ (lock) the door.
21. How long ___________ (they/drive) before
they ___________ (stop) to have a rest?
22.By the time the lesson ___________ (finish), I
___________ (do) all my homework.
23.When I ___________ (be) a little girl I often
___________ (go) with my mum to the
playground.
24.___________ (you/close) all the programs
before you ___________ (turn off) the
computer?
-
Предмет:
Английский язык -
Автор:
erinsxyk - 5 лет назад
-
Ответов:
1 -
Смотреть
-
Топ пользователей
-
Fedoseewa27
35894 -
Askold
2792 -
Pikachu
2224 -
hobbesbowers
2116 -
kaylynnbarron676
1818 -
女fei
1240 -
yulia-kaplina
1156 -
Poinntt
946 -
Bars
930 -
Queenmagic18
754
How much to ban the user?
1 hour
1 day
100 years