Предмет: Алгебра, автор: sheshttt

СРОЧНО ПОМОГИТЕ !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

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Ответы

Автор ответа: kberdi

0

Ответ:

27-9=4+5

9=18

18/9

9/9

1

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Предмет: Математика, автор: Nasty00595

Пожалуйста помогите!!

На лугу выгуливали гусей и коров.

Всего 46 ног и 15 голов

Сколько всего гусей и коров?

СРОЧНО❗❗❗

Даю 20 баллов!!!!
Заранее спасибо

1 год назад

Предмет: Английский язык, автор: Аноним

Пожалуйста помогите!
Test
№ 1
Choose the correct variant.
If you don’t work hard, you_______pass the test.
A. won’t
B. can
C. will
D. would
E. shall
№ 2.
Choose the right variant:
Oh dear, I ……. his name.
A. have forgotten
B. will forget
C. forgotten
D. has forgotten
E. to forget
№ . 3
Choose the right variant:
The weather ……. last week.
A. were good
B. is good
C. was good
D. good
E. had good
№ 4.
Choose the right variant.
What floor ____ your bedroom on?
A. has
B. is
C. have
D. are
E. does
№ 5.
Choose the right variant:
Have you ….. the new cinema yet?
A. look at
B. gone
C. spent
D. been to
E. being
№ 6.
Choose the right variant.
What subjects_____she good at?
A. is
B. does
C. do
D. are
E. has
№ 7.
Choose the right variant:
How long …. you been waiting for the bus?
A. will
B. are
C. were
D. have
E. did
№ 8.
Choose the right variant:
She was having dinner …. her husband called.
A. after
B. since
C. when
D. while
E. for
№ 9.
Choose the right variant:
He’s the most boring person we’ve …. met.
A. ever
B. never
C. yet
D. sometimes
E. already

№ 10.
Choose the right variant:
Bill has got a wide … and wrinkles.
A. ears
B. build
C. chin
D. forehead
E. eyes
№ 11.
Choose the right variant:
moustache
A. мұрт
B. ауыз
C. қол
D. шаш
E. қол
№ 12.
Choose the right variant:
Nick and Jason ….. each other since childhood.
A. to know
B. were knowing
C. used to know
D. know
E. have known
№ 13.
Choose the right variant:
Where …… on holiday last year?
A. did you go
B. were you going
C. have you been
D. used to go
E. do you go
№ 14.
Choose the right variant:
After ….. he started looking for a job.
A. to graduate
B. graduate
C. graduation
D. will graduate
E. have graduated
№ 15.
How often _____Dan come to the club?
A. does
B. is
C. was
D. do
E. are
№ 16.
Choose the correct preposition:
Mike is dedicated ….. his work.
A. with
B. at
C. from
D. to
E. in
№ 17.
Choose the correct word:
He usually ….. the lawn.
A. mows
B. takes
C. gets
D. sleeps
E. spends
№ 18.
Choose the right variant.
There weren’t any sports there, ______?.
A. were there
B. was there
C. aren’t here
D. weren’t you
E. was he
№ 19.
Choose the right variant.
I can’t find my shoes. I’ve looked________.
A. every
B. nowhere
C. everywhere
D. somewhere
E. anywhere
№ 20
Choose the right variant
He wasn’t at home,______?
A. did he
B. does he
C. was he
D. is he
E. didn’t he
№ 21
Choose the right variant.
To play ______violin.
A. the
B. a
C. an
D. ---
E. on

№ 22
Choose the right variant.
To be in____hurry
A. a
B. the
C. an
D. ---
E. bit
№ 23
Choose the correct preposition:
Almaty is famous … its apples.
A. in
B. with
C. under
D. away
E. for
№ 24.
Choose the correct variant:
…… people……..cars one hundred years ago?
A. Did/drive
B. Have/driven
C. Are/driving
D. Will/drive
E. Do/drive
№ 25.
Choose the correct word:
My grandparents grow their vegetables_______.
A. themselves
B. yourself
C. herself
D. ourselves
E. himself
№ 26.
Choose the correct word:
Lucy likes things ….. are useful.
A. which
B. whom
C. where
D. who
E. why
№ 27.
Choose the correct answer:
1. In the office she sometimes………….letters to foreign firms.
A. write
B. is writing
C. has written
D. writes
E. will write
№ 28.
Fill in the missing word:
He ……. for that phone call since 5 o’clock
A. has been
B. waits
C. has been waiting
D. will wait
E. is waiting
№ 29.
Choose the correct modal verb:
She ….. be married. She was wearing a wedding ring.
A. must
B. could
C. needn’t
D. can’t
E. have to
№ 30.
Choose the right variant:
Lake Loch Ness is situated in …..
A. Scotland
B. England
C. Wales
D. Australia
E. Ireland

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1) Сформулируйте «золотое правило» механики

2) Что называют коэффициентом полезного действия?

3) Дайте определение понятию полезная работа:

4) Дайте определение понятию полная работа:

2.Сделайте рисунок, запишите все формулы, заполните таблицу, используя данные в этом документе, выполните все вычисления.

( будьте внимательны, вычисления предоставлены не все, а вам необходимо выполнить расчёты ко всем 3 опытам!)

Вычисления выполнять после таблицы под пунктом 12.

Сделать вывод.

Работа, совершаемая при подъёме тела вверх по вертикали, равна произведению силы тяжести F1 на высоту h (полезная работа)
A1 = F1 * h

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