Предмет: Физика, автор: nurzada09091994

коэффициент полезного действия идеальной тепловой машины равен 0.4. Определить температуру нагревателя если температура холодильника 27 градус сельссия.

Ответы

Автор ответа: lubanetsm

кпд= tхолодильника \ t нагревателя0,4 = 10\хх= 10\0,4=25 свроде так.

nurzada09091994: температура холодильника идеальной тепловой машины равна 27 градус с. КПД равен 0,4. определить нагривателя

Предыдущий вопрос

Следующий вопрос

Похожие вопросы

Предмет: Математика, автор: djearemy

ХЕЛП МИ ПЛИС ОТДАМ ВСЕ БАЛЫ ТОМУ КТО РЕШИТ

1 год назад

Предмет: Математика, автор: redmiredmin548

найдите значение выражения:
a)-m+p+2+m-14, если m=3,6, p=-8,9
б)-4-x-y+x-13, если x=-9,2, y=10,3

1 год назад

Предмет: Қазақ тiлi, автор: cubdmitrij81

6 предложений на тему "олемпийские игры" на казахском!!!

1 год назад

Предмет: Русский язык, автор: xczzxc

Даю 50 баллов !!!!
Задание на фотографии
Заранее спасибо)

7 лет назад

Предмет: Английский язык, автор: daria3295

ПОМОГИТЕ ПОЖАЛУЙСТА!!!!
ОЧЕНЬ СРОЧНО СЕГОДНЯ НАДО СДАТЬ!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Task 1. Match activities and the places where you can do them. ЦИФРА и цифра

1. Gym 4. Department store 7. Aquarium

2. Fast-food restaurant 5. Theatre 8. Zoo

3. Library 6. Gallery 9. Cinema

See fish

Buy things

See works of art

Watch a film

See animals

Read

Have a snack

See a play

Task 2 Choose the right variant. ЦИФРА и цифра

1.restaurant 4. palace 7. park 10. cottage

2. zoo 5. pool 8. store 11.sports

3. gallery 6. library 9. tent

1. They live in a ............... in the country

2. There are lots of works of art in the ...........

3. This is a really big department ............... .They sell everything here!

4. My sister wants to see the animals at the ...............

5. I’m hungry. Can we go to a fast food .............?

6. The Queen lives in a big ............... .

7. They are staying in a small ............... at the campsite.

8. Timothy is keeping fit at the ............. centre

9. I’m taking this book back to the ...............

10. Why don’t we go swimming in the swimming ...............?

Task 3. Choose the correct item.

а. Bruce lives in a large block of ........ . ЦИФРА и БУКВА

1. flats

2. hotels

3. tents

b. They are staying in a fantastic ........ while they’re on holiday.

1. hotel

2. palace

3. tent

c. Are you ........? I totally disagree.

1. strange

2. serious

3. brilliant

d. There are too many ........ about what we can and can’t do.

1. timetables

2. grounds

3. rules

e. We pay the ........ for our house every month.

1. rent

2. price

3. ticket

f. He’s going to the International Summer ........ in August.

1. School

2. Flat

3. House

Task 4. Which is right?ЦИФРА и Цифра

1. You can ... at the cinema.

1. have a picnic

2. watch a film

You can .... at the gym.

1. exercise

2. relax

You can ... at the library

1. find a book

2. take pictures

You can ... at the aquarium.

1. see fish

2. watch football

You can ... at the theatre.

1. swim

2. see a play

Task 5 Choose the best variant. ЦИФРА и БУКВА

а You ... pay your rent. That’s the rule.

1 must

2. can't

3. mustn't

b You ...... eat in the classroom. It’s forbidden.

1. must

2. mustn't

3. can't

c You ... have any pets in this house. It’s not allowed

1. must

2. can't

3. can

d You ..... go to the doctor. You look very ill.

1. must

2. mustn't

3. can't

e You .... go to school. That’s the law.

1. must

2. can't

3. mustn't

Task 6 Choose the right item ЦИФРА и Цифра

1/Students ... wear a school uniform every day, but on Friday they ... be dressed as they wish.

1.must

2.mustn’t

3.can

4.can’t.

2. Students ... be late for the lesson.

1.must

2.mustn’t

3.can

4.can’t..

3. Students ... ask for help and have extra-classes.

1.must

2.mustn’t

3.can

4.can’t.

Students ... talk at the lesson.

1.must

2.mustn’t

3.can

4.can’t..

Students ...ask a question only with their hand raised.

1.must

2.mustn’t

3.can

4.can’t

Task 7 ЦИФРА и слово

1 What is the …..river in the world?

the biggest

bigger

biggest

2. He is a little … than me.

tall

tallest

taller

3. My doll is the …..of all.

more beautiful

beautiful

most beautiful

4. It is the …..church in my city.

the oldest

older

oldest

5. She is one of …..tennis players in the world.

good

better

the best

6. Your work isn’t very good. I know you can do …

bad

worse

better

7. Russia is ……. country in the world.

big

the biggest

bigger

8. My home task is a bit boring sometimes. I’d like to do something…..

interesting

more interesting

the most interesting

9. The weather is too hot in this city. I’d like to live somewhere ….

hotter

colder

warmer

Task 8 Write the correct form of the adjective in brackets ЦИФРА и слово

1.This is Sarah Jones and her brother, Mike. Sarah is (short)

than Mike, but he is (young) than her

2. He is the (young) student in his class.

3. They are both intelligent, but Sarah is (intelligent) than Mike.

4. In fact, Sarah is (intelligent) girl in their school.

5. Sometimes they argue, but Sarah thinks Mike is ( good) brother in the world.

Task 9 Put words in correct order to make sentences. ПОЛНОСТЬЮ

1. to/go/school./has/Tracy/to

2. the/has/do/He/washing up./to

3. early./wake/They/to/have/up

4. a/have/wear/to/don’t/uniform./We

5. your/You/make/needn’t/bed.

6. the/have/doesn’t/flat./to/She/clean

7 лет назад