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kikuco05
2 năm trước
một bình cách nhiệt chứa nước ở nhiệt độ bạn đầu to. Thả vào bình cách nhiệt viên bi kim loại có nhiệt độ T, nhiệt độ nước trong bình sau khi cân bằng là t1=44 độ C. Tiếp theo ta gắp viên bi ra rồi thả vào bình viên bi thứ 2 giống như viên bi trước. Sau khi cân bằng nhiệt, ta lại gắp viên bi thứ 2 ra rồi thả viên bi thứ 3 giống như 2 viên bi trên.. và cứ tiếp tục như vậy xác định nhiệt độ tn ( tn<100 độ C ) của nước trong bình sau khi thả vào bình viên bi thứ n. Với viên bi thả vào bình thứ bao nhiêu thì nước bắt đầu sôi. Cho rằng chỉ có sự trao đổi nhiệt giữa bi và nước trong bình giúp mình với ạ
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