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nguyenthaiha856
2 năm trước
chất khí nở vì nhiệt nhiều hơn......................... ; chất lỏ vì nhiệt nhiều hơn.................... phải có điều kiện gì thì quả bóng bàn bị móp , được nhúng vào nước nóng mới có thể phồng lên ? tại sao không khí nóng lại nhẹ hơn không khí ? ( hãy xem lại bài trọng lượng riêng để trả lời câu hỏi này)
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