qnhchphamthi qnhchphamthi

09-11-2022
Physics

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Một chiếc bàn 4 chân có khối lượng 5kg được đặt nằm yên trên mặt sàn. Diện tích tiếp xúc của một chân ghế là 20 cm2. Tính áp suất do ghế tác dụng lên mặt sàn?

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