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nhankyy
1 năm trước
Dựa vào bảng ghi độ tăng chiều dài của các thanh kim loại (có chiều dài ban đầu là 100 cm) như sau: Chất Độ giãn nở dài khi nhiệt độ tăng thêm 50 o C Nhôm 0,12 cm Đồng 0,086 cm Sắt 0,06 cm Hỏi một thanh nhôm dài 10 m khi nhiệt độ của nó tăng từ 20 o C lên đến 50 o C thì chiều dài của nó là bao nhiêu giúp mik vs mik cần ngay bây giờ
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