Предмет: Физика, автор: denisbazhenov9

Сколько килограмм каменного угля нужно сжечь, для получения 700кДЖ количества теплоты?

Ответы

Автор ответа: petia20011
0
Q=qm
m=Q/q
(Q=700000Дж)
(q=20500000Дж/кг)
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Задание 1 Choose the correct words in brackets and write it.
1
Paul played computer games (yesterday/the whole evening yesterday).
2
We were writing this exercise (yesterday/the whole evening yesterday).
3
I was not sleeping at nine o’clock (yesterday/the whole evening yesterday).
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My brother didn’t play tennis (yesterday/the whole evening yesterday).
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He played tennis (the day before yesterday/the whole evening yesterday).
7
She did her homework (yesterday/the whole evening yesterday).
8
She was cooking the holiday dinner (yesterday/the whole evening yesterday).

Задание 2 Choose the correct form of the verb.
1
What _________ he ___________ yesterday?
a). did he do b). was he doing c). were he doing
2
My sister _________________ the piano at four o’clock yesterday
a). didn’t play b). wasn’t playing c). weren’t playing
3
_____she ____________ when you came home?
a). did she sleep b). was she sleeping c). were she sleeping
4
We ____________ the floor in our flat yesterday.
a). washed b). was washing c). were washing
5
While Mary _____________the composition, her little brother ________
a). wrote, slept b). was writing, was sleeping c). was writing, slept
6
They ___________at the table the whole evening yesterday
a). sat b). was sitting c). were sitting
7
_____ you ______ your homework yesterday?
a). did you do b). was you doing c). were you doing
8
We ___________ the dishes from three till four yesterday
a). washed b). was washing c). were washing

Задание 3 Choose the correct form of the verb.
1
I (to go) to the cinema yesterday. _____________________
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He (to go) to the cinema at four o’clock yesterday. ________________
3
I (to do) my homework when my Mum (to come) home. _____________
4
I (not to play) the piano yesterday. I (to write) a letter to my friend. ____
5
He (not to sleep) when Dad (ring up). He (to do) his homework. _______

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1
the whole evening yesterday/He/at the table/(to sit).
2
(not to sleep)/Mary/when/came home/her father.
3
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My friends/ their homework/(not to do)/the day before yesterday.
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