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locthihoa
2 năm trước
một vật đặc có khối lượng 4200g và khối lượng riêng D=10,5g/cm^3 được nhúng hoàn toàn trong nước . tính lực đẩy acsimet tác dụng lên vật , cho trọng lượng riêng của nước d=10000N/m^3
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