Предмет: Физика, автор: nb8d4jrkyr

ПОМОГИТЕ ПОЖАЛУЙСТА!!!
ДАЮ 50 БАЛЛОВ!!

На нагрівнику потужністю 800 Вт нагріли у мідній посудині масою 500 г 1,5 л води при температурі 20 С і перетворили у пару. Скільки часу затратили , якщо ККД 80% ?

Ответы

Автор ответа: Cohendd
1

Ответ:

Объяснение:.....

Приложения:
Похожие вопросы
Предмет: Английский язык, автор: tatuel387
1. Выбрать правильный ответ 1.Take the pen ... the shelf. a) out of b) from c)up 2.I like ... lot of milk in my tea. a) the b) - c)a 3. ... very far to walk. a) There was b) It was 4. 9 o’clock is ... time when I’m allowed to come home. a) the last b) the latest c) the least 5.Will you have ... cup of tea. a) other b) another c) the other 6.She looked ... today in her new coat. a) good b) well c) nicely 7.Everybody failed the exam ... you. a) except b) beside c) besides 8.It was ... advice. It helped me a lot. a) useful b) useless c) used 9.I got ... letter from Bob. a) another b) else c) more 10.She has ... many friends. a) such b)as c)so 2. Выбрать правильную форму слова. 1.She is ... in her group. a) shorter b) short c) the shortest 2.You ... Drink milk if you don’t want. a) cannot b) needn’t c) should 3.The policeman asked if I ... the stranger. a) saw b) have seen c) had seen 4.Bob asked John ... volley-ball. a) did he play b) if he had played c) if he played 5.He always meets me at the station but today he ... me near the bus stop. a) meets b) met c) has met 6.While he ... his dinner I explained to him what to do. a) had b) was having c)has had 7.You ... do it in time. a) needn’t b)mustn’t 8.The garden ... a lot since I was there last. a) changed b) has changed c) had changed 9.The teacher asked his pupils... the poem by heart. a) learn b) learned c) to learn 10. ... usually does this work? a) whom b) who of you c) which of you​
Предмет: География, автор: marshashola3