Physics, 22.06.2021 14:00 carlinryan

Cửa mương thủy lợi có thể quay quanh trục A và tựa vào gối B như hình 2. Cửa mương sẽ bắt đầu mở khi mực nước h cách mặt đáy bao nhiêu mét?

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Cửa mương thủy lợi có thể quay quanh trục A và tựa vào gối B như hình 2. Cửa mương sẽ bắt đầu mở kh...