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Physics, 21.07.2021 14:00 epicness5815
Một ống hơi dài có đường kính 8 cm có nhiệt độ bề mặt bên ngoài là 90°C. Xác định tốc độ mất nhiệt từ ống trên một đơn vị chiều dài của nó khi không khí ở áp suất 1 atm và 7°C và gió thổi qua ống với vận tốc 50 km /h.
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Một ống hơi dài có đường kính 8 cm có nhiệt độ bề mặt bên ngoài là 90°C. Xác định tốc độ mất nhiệt t...
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