Вопрос школьника по предмету Физика
1)Почему порох не используют в виде топлива для обогрева жилья?
2)Как сравнить, при сгорании какого топлива выделяется больше тепла?
1)Почему порох не используют в виде топлива для обогрева жилья?2)Как сравнить, при сгорании какого топлива выделяется больше тепла?
Ответ учителя по предмету Физика
Ответ:
1)Потому что порох взрывоопасен
2)Например при помощи простой печи , котелка с водой и термометра.Сначала сжечь один вид топлива и замерять температуру воды.Затем дождаться полного остывания системы печь-котелок, и провести эксперимент с другим видом топлива.
Объяснение:
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GRAMMAR
REPORTED STATEMENTS
1. Complete the sentences with said or told
1. The librarian ________ a friend that his job was dangerous, as books could fall on you.
2. The rock musician ‘Fling’ _________ us that he was going to sing his new song.
3. Passenger Pusher Susie Quinn _________ she would stay with filming when he heard the news.
4. Kevin Postgate ____________ journalists that he had been filming when he heard the news.
5. Lee Kelly ____________ she had not been injured in ten years as a policewoman.
6. The politician Kerry Blackmore __________ that she was writing a novel about parliament.
2) REPORTED QUESTIONS
1. Match (1-6) and (a-f) to make reported questions.
1. laura’s pen friend wanted to know how long.
2. the journalist was interested to know if
3. the new teacher asked me what
4. the waiter asked us if.
5. the policeman asked the little boy why
6. the tourist wanted to know whether a. he had broken the windows.
b. there was a bus station near here.
c. my favourite subjective was.
d. she had spoken spanish
e. the rock group were going to stay together.
f. we all wanted a starter.
37÷5=
56÷9=
42÷8=
63÷16=
54÷17
49÷24=
81÷6=
59÷4=
92÷9=
86÷15=
72÷19=
80÷11=
Помогите пожалуйста Заранее спасибо
0.5x+y=3
помогите пж.