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Что называют удельной теплотой плавления вещества?
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Предмет:
Физика -
Автор:
brooke8tir - 6 лет назад
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Ответы 2
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Удельная теплота плавления - физическая величина, характеризующая определенное вещество и равно количеству теплоты, которую необходимо передать твердой кристаллической веществе массой 1 кг, чтобы при температуре плавления полностью превратить ее в жидкость.
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Автор:
artemios9mt - 6 лет назад
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0
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Это количество теплоты которое необходимо сообщить 1 кг вещества, нагретому до темп. плавления, чтобы привести его из твердого состояния в жидкое.
λ= Q/m
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Автор:
puffy - 6 лет назад
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0
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Упр. 190. Раскройте скобки, употребляя гла¬голы в Past Simple или Past Continuous.
1. When I (to come) home, my little sister (to sleep). 2. When Nick (to come) home, his brother (to play) with his toys. 3. When mother (to come) home, I (to do) my homework. 4. When father (to come) home, Pete (to sleep). 5. When mother (to come) home, the children (to play) on the carpet. 6. When I (to get) up, my mother and father (to drink) tea. 7. When I (to come) to my friend's place, he (to watch) TV. 8. When I (to see) my friends , they (to play) football. 9. When I (to open) the door, the cat (to sit) on the table. 10. When Kate (to open) the door, the children (to dance) round the fir-tree. 11. When Tom (to cross) the street, he (to fall). 12. When I (to go) to school, I (to meet) my friend. 43. When we (to go) to the cinema, we (to meet) grandmother. 14. When grandmother (to go) home, she (to see) many children in the yard. 15. When Henry (to walk) about in the forest, he (to find) a bear cub. 16. When we (to walk) about in the for¬est, we (to see) a hare. 17. When I (to wash) the floor, I (to find) my old toy under the sofa. 18. When granny (to read) a book on the sofa, she (to fall) asleep. 19. When I (to play) in the yard, I suddenly (to see) my old friend. 20. When Nick (to run) about in the yard, he (to fall).
Упр. 191. Раскройте скобки, употребляя гла¬голы в Past Simple или Past Continuous.
1. They (to drink) tea when I (to come) home. 2. He (to walk) along the river when a boat (to pass). 3. The old man (to think) about his plan when he (to fall) asleep. 4. We (to listen) to an interesting lec¬ture yesterday. 5. When I (to enter) the classroom, the teacher (to write) words on the blackboard and the pupils (to copy) them into their exercise-books. 6. They (to get) ready to go out when it (to begin) raining. 7. Yesterday at one o'clock I (to have) lunch at the canteen. 8. When he (to come) in, I (to do) my exercises. 9. What you (to do) at eight o'clock yesterday? 10. At this time yesterday I (to go) home. 11, You (to sleep) when I (to go) out. 12. He (to read) on the sofa when I (to come) in and (to sit) down beside him. 13. I (to walk) along the street with my friend when a tram (to pass). 14. She (to look) out of the window when I (to see) her. 15. We (to answer) the teacher's questions when the head-mistress (to enter) the classroom.-
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