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nhutruong1109
2 năm trước
Một bọt khí ở đáy hồ sâu 7,5 m nổi lên trên mặt nước. Giả sử nhiệt độ ở đáy hồ và mặt hồ là như nhau. Cho biết áp suất khí quyển po= 75cmHg, và khối lượng riêng của thủy ngân là1,36.10^4. Thể tích bọt khí đã tăng lên
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