Physics, 10.10.2021 14:00 kayleewoodard
Quả cầu nhỏ khối lượng 3,6×10^-15 kg, mang điện tích 4,8×10^-18 C được treo bởi một sợi dây không dãn, khối lượng không đáng kể
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Quả cầu nhỏ khối lượng 3,6×10^-15 kg, mang điện tích 4,8×10^-18 C được treo bởi một sợi dây không dã...
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