ノズル流速の計算
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管内の圧力が10KPa、管径が150mmであり、もし管に直径2mmの開口部がある場合、その開口部から1分間にどれだけの体積のガスが失われるか、またはガスの流速はいくらになるか。ガスの平均分子量は30とする
誰も答えないの？簡単すぎるのか、それとも難しすぎるのか；P
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