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bao2029
2 năm trước
1. Thế nào là nhiệt độ nóng chảy? 2. - Trong thời gian nào chất này chỉ tồn tại ở thể rắn, chỉ tồn tại ở thể lỏng, tồn tại cùng lúc cả hai thể rắn và lỏng? - Thời gian nóng chảy của chất này là bao nhiêu? Đây là nhiệt độ nóng chảy của chất nào? 3. Vì sao trong nhiệt kế đo nhiệt khí quyển ở các xứ lạnh, người ta dùng rượu chứ không dùng thủy ngân?
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