[問題] 流體力學
請教一下各位高手~謝謝
泵的定義效率:
http://imgur.com/a/uGKX0
問題:
http://imgur.com/a/2loTI
我照著定義去做,可是算出來和解答不一樣??
.................................................
我把泵的定義顛倒寫,結果算出來居然和解答一樣?!!
http://imgur.com/a/oMaZ9
所以,到底是哪裡錯了呢??
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