Физика в опытах - 10 класс101016 Воздушное огниво
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![Лучшая модель атома? [Минутка физики]](https://sun9-10.userapi.com/7c_heaDaw2cjOctnwZDSIpW-2eeO5HXNfHbuEw/EjNM442SrEw.jpg)
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