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Тело при бросании вверх приобрело энергию 200 дж. До какой высоты поднимется тело, если его масса 500 грамм?
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Предмет:
Физика -
Автор:
jamarcusio7y - 6 лет назад
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Ответы 1
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по закону сохранения энергии начальная кинетическая энергия в верхней точке полета(когда тело уже не поднимается) переходит в энергию потенциальную. Eк = Eп; Eк = mgH => H = Eк/mg = 40 м
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Автор:
guadalupelane - 6 лет назад
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0
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Умоляю , помогите с английским .
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LANGUAGE EXTINCTION
Language death is nowadays a phenomenon with a much more frequent A 1 _______ than the death of animals or plants species. Every two weeks, one language goes out of A 2 ________. Although language extinction is a natural process, it raises controversial issues A 3 ________ to society and culture.
Linguists have defined a language as being dead the moment its last speaker passes A 4 _______. What causes the extinction and final death of a language? Usually, a language has higher chances to die when people speaking it are assimilated by other cultures. In this case, the language dies slowly, by merging with the language of the assimilators. Or its death can be a more accelerated process when the speakers A 5 _______ up their own language because they don’t find any benefit in using it. Many of the dying languages have no written records, so once they go, they will be lost forever. Of course, speaking one of these languages is not seen as an asset within the business or working environment today. But it can be an asset from cultural and even scientific point of A 6 _______.
Preserving your own language is a proof of self-respect and of respect for your past. Learn as many foreign languages as possible, but never forget your native language just because you can’t find any benefit in using it throughout your day-by-day life. And if you are one of the few speakers of a language, contribute to getting it out of the death threat. A 7 _______ your knowledge with others who are interested in expanding their horizons by learning a foreign language.
A 1. 1) appearance 2) existence 3) occurrence 4) occasion
A 2. 1) world 2) use 3) mind 4) way
A 3. 1) concerned 2) dealing 3) regarding 4) related
A 4. 1) over 2) away 3) out 4) off
A 5. 1) change 2) break 3) end 4) give
A 6. 1) order 2) interest 3) view 4) opinion
A 7. 1) Share 2) Give 3) Pass 4) Conve
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