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thquangtrungbmt
2 năm trước
Một xi lanh hình trụ có tiết diện thẳngS= 20cm^2. Trong xi lanh nhot một lượng khí ngăn cách với khí quyển nhờ một pitong có trọng lượng 10N. Khi xi lanh nằm ngang chiều dài cột khí trong xi lanh bằng 20cm bỏ qua ma sát giữa pitong và thanh trong xi lanh lúc áp suất khí quyển bằng 10^5 Pa. Coi nhiệt độ không đổi nếu dựng xi lanh thẳng đứng, đáy xi lanh nằm ở phía dưới thì chiều dài của cot khí trong xi lanh
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