Physics, 30.07.2021 03:10 liltay12386
Cho điểm sáng s nằm trước gương phẳng và cách gương 25 cm. Dịch chuyển điểm sáng s tưới vị trí sao cho ss'lúc này tăng thêm 10cm so với ban đầu
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Cho điểm sáng s nằm trước gương phẳng và cách gương 25 cm. Dịch chuyển điểm sáng s tưới vị trí sao c...
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