→ kronce:體積=速度×截面積...純屬猜測... 推 61.226.135.233 04/28
→ keepgoing:我也曾這樣想... 只是不懂為何給速度 推 61.228.0.151 04/28
→ zaza:應該是用體積流率吧.....我猜的 推140.112.239.171 04/28
A stream of air enters a 7.50-cm ID pipe at a velocity of 60.0 m/s at 27'C
and 1.80 bar (gauge). At a point down stream, the air flows through a 5.00-cm
ID pipe at 60'C and 1.53 bar (gauge). What is the velocity of the gas at this
point?
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啥是 ID pipe? 還是指直徑7.50cm的管子?
這題為什麼跟速度有關係?
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順便.... 作業(ch5) : 6,10,25,32,58,64,67,76
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◆ From: 61.228.0.151
※ 編輯: keepgoing 來自: 61.228.0.151 (04/28 18:40)