Предмет: Физика, автор: darusskka

«Тиск в рідині» домашня робота
будь ласка допоможіть дам усі бали

Приложения:

Ответы

Автор ответа: romaprihodko2006
1
1) Увеличится
2) P=F/S и P=pgh
3) Когда заполнен водой, так как ее плотность больше, а значит и масса больше, а значит и сила давления больше, а значит, при неизменной площади, давление больше.
4) 10⁵ Па, т.к при давлении в одну атмосферу высота столба 760 мм.
5) S=20 см² = 2*10^(-3) м²
P=800*10*2.5=2*10⁴ Па (0.2 ат)
F=40 Н
6) Pрт=12240 Па
Pв=1520 Па
P=Pрт+Pв=13760 Па
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Stop watching TV. You_______ do your homework.
must
mustn't
don't have to

I am a librarian. I must _______ .
design modern cars
meet a lot of people during the day
know all the laws

You _________ use your mobile phone at school. You _________ do tests without your classmates' help.
must, mustn't
mustn't, must
must, must

I ______learnt English every day because I`m going to England next month.
don't have to
has to
have to

You __________ be late!
have to
must
mustn't

My mother is a housewife. She _________ do a lot about the house.
must
has to
doesn't have to

__________ has to use a computer and help a boss to plan the time.
A postal worker
A computer operator
A secretary

It is _________ to be policeman
easy and boring
boring and exciting
hard and dangerous

Jim ______ get up at 6 o’clock. He lives far from his work.
have to
doesn't have to
has to

If you have a headache you ________ go to school.
mustn't
must
don't have tо

Dates: 1983
nineteen eighty-three
one thousand nine hundred eighty-three
one thousand nine hundred eighteen

I ______ breakfast before I went to school.
have had
had have
had had

She went to the post-office after she _________ the letter.
had written
has writing
is writing

I didn’t read the text in class because I _____ my book at home.
left
had left
had leave

Jill was afraid she _____ her key at home, but she found it in her handbag.
forget
had forgot
had forgotten

The children didn’t want to go to the cinema because they ______ already ________the film.
has watched
had watched
had watch

I apologized I _____ her.
hadn't called
haven't called
hadn't calling

Chloe _______ happy because she ________ her ring.
was; hadn't found
wasn't; hadn't found
wasn't; had found

I ________ bad after I _________ a bottle of juice.
felt; had drunk
felt; had drank
had felt; drank

A robber ______ , when police officers ___________.
escape; had arrived
had escaped; had arrived
had escaped; arrived