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Có 2 tấm phẳng đặt song song nằm ngang và có khoảng cách giữa 2 tấm phảng là h= 10mm. Giữa 2 tấm phẳng là lớp đầu có nhiệt độ là 20C và p=0,972.10 * Pa. s. Tấm phẳng phía dưới cố định và tắm phẳng trên chuyển động đều với vận tốc v=1,5 m/s. Hãy xác định ứng suất tiếp tuyến t xuất hiện giữa hai tấm phẳng trong
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Có 2 tấm phẳng đặt song song nằm ngang và có khoảng cách giữa 2 tấm phảng là h= 10mm. Giữa 2 tấm phẳ...
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