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lnq205
2 năm trước
Một vật làm bằng đồng có khối lượng 1,78 kg được thả vào trong nước. Biết khối lượng riêng của đồng và nước 8900 kg/m³ khối và 1000 kg/m³. Hỏi lực đẩy Ác si mét có phương chiều và độ lớn như thế nào?
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