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Increase strength of magnet | Discoveries and projects | Physics | Khan Academy Khan Academy Labs 0:55 11 years ago 217 868 Далее Скачать
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Hysteresis & magnetic retention | Magnetism & matter | Physics | Khan Academy Khan Academy India - English 13:39 3 years ago 135 719 Далее Скачать
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Magnetic effect of electric current intro | Class 10 Physics | Khan Academy Khan Academy India - English 0:33 1 year ago 1 184 Далее Скачать
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