Предмет: Химия, автор: olyaaa5555

В двигателе внутреннего сгорания сожжен 1 кг бензина. За это время он совершил работу равную
13, 8•10 5 дж. Каков КПД двигателя? Удельная теплота сгорания бензина 4,6-10 7
Дж/кг.

Ответы

Автор ответа: Kitsune250
1
(13,8*10^5/4,6*10^7)*100%=0,03*100%=3%
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Промежуточная аттестация 6 класс
Вариант 1
1. Прочитайте текст. Определите, какие из предложений
соответствуют содержанию текста (True), а какие не соответствуют
(False).
My mother wants me to become an ассоuntant but I`m not good at Maths. I`m
going to leave school in 4 years and I have enough time to choose what I want to
be. My mother and father promise that they will help me to make a good choice.
My elder sister is very bossy, she always tries to control me but never give a piece
of advice. I am ready to asking my parents for advice but I’m afraid they won`t
like my idea. I don`t play any musical instrument but I love music and I love and
respect people with a musical talent and my dream is to organise concerts and
musical tours. I`m going to be a band manager.
1) My mother wants me to become an architect.
2) I'm good at Maths.
3) I'm going to leave school in four years.
4) My parents want to help me to make a good choice.
5) My younger sister is very bossy.
6) I play violin.
7) I respect talented musicians.
2. Раскройте скобки. Поставьте глаголы в нужной форме. (Past Simple or
Present Perfect):
1) We already (read) all the
exercises._________________________________________________
2) Yesterday my aunt (go)
shopping._________________________________________________
3) He just (join) us____________________________________________
4) I (visit) my uncle last
Saturday.__________________________________________________
5) I never (be) to Moscow.______________________________________
6) They already (read) the poems.________________________________
7) They (go) to the theatre last week.______________________________
8) She just (see) her teacher. ____________________________________

3. Прочитайте текст и вставьте слова в пропуски. Запишите ответы в
таблицу.
was went narrower third people
The summer of 1666 __1__very hot and there was no rain. The fire started in a
baker’s shop and soon it became very big. In those days the streets of London were
__2__than today so the fire__3__ quickly from house to house and from street to
street. Many __4__ran away from London but others stayed to fight the fire with
water from the River Thames. The terrible fire stopped only on the__5__ day when
six thousand people were dead.