9 кл - 30. Период полураспада. Активность радионуклидов
Урок физики в Ришельевском лицее
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![Linkin Park - The Emptiness Machine [2024 Billboard Music Awards]](https://sun9-52.userapi.com/gEPX190aOi1jzKQZhKbqiQUkxJ3_NJ2-gRiN5w/67EcZ1jhDKc.jpg)
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![Numb (Official Music Video) [4K UPGRADE] – Linkin Park](https://sun9-45.userapi.com/dkbje_5AOoD1m_Ij6zE19MUMr9lUJvazBXjNvg/ozci98LBWGw.jpg)
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