Treo 1 vật = kim loại vào 1 lực kế thì lực kế chỉ 38N . Khi nhúng chìm vào vật vào bình tràn thì phần nước tràn ra có thể tích là 0,5 lít . Trọng lượng riêng nước là 10000N/m3 . Hỏi a) Khi nhúng vật vào bình trần thì lực kế chỉ bao nhiêu? b) tính TLR của vật cho thêm tóm tắt nữa

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