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lshoangtinhls00001
2 năm trước
Hai điện tích điểm bằng nhau đặt trong chân không cách nhau một khoảng 4cm, lực đẩy tĩnh điện giữa chúng là F1=9.10-5N. Để lực tác dụng giữa chúng là F2=1,6.10-5N thì khoảng cách giữa chúng là bao nhiêu?
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