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uyen2021
2 năm trước
Bài 11: Một cục nước đá có thể tích 400 cm³ nổi trên mặt nước. Tính thể tích của phần nước đá nhô ra khỏi mặt nước. Biết khối lượng riêng của nước đá là 0,92 g/cm³ Bài 12: Thả một vật hình cầu có thể tích V vào dầu hỏa, thấy 1/2 thể tích của vật bị chìm trong dầu. a. Tính khối lượng riêng của chất làm quả cầu. Biết khối lượng riêng của dầu là 800 kg/m³ b. Biết khối lượng của vật là 0,28 kg. Tìm lực đẩy Ac si met tác dụng lên vật
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