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Physics, 23.09.2021 23:40 liljohnsjs218

tại 3 đỉnh A, B và C của một tam giác đều, người ta đặt 3 điện tích giống nhau q1=q2=q3=q=6*10^-6 C. Phải đặt điện tích thứ tư q4 có dấu và độ lớn bằng bao nhiêu và đặt ở đâu để hệ cân bằng

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tại 3 đỉnh A, B và C của một tam giác đều, người ta đặt 3 điện tích giống nhau q1=q2=q3=q=6*10^-6 C....
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