1)
一條內直徑為2.6cm的水管以0.8m/s的速率輸水,問每秒鐘輸出多少水?
Math 圓
2007-08-25 12:33 am
回答 (3)
2007-08-25 12:41 am
✔ 最佳答案
每秒鐘輸出：先把m變成cm，即是80cm/s。
2.6÷80
=0.0325 (ml)
∴每秒鐘輸出0.0325ml的水。
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2007-08-28 1:13 am
一條內直徑為2.6cm的水管以0.8m/s的速率輸水,問每秒鐘輸出多少水?
１ｍ＝１００ｃｍ
０．８ｍ＝８０ｃｍ
每秒鐘輸出：
２．６÷８０
＝０．０３２５
所以每秒鐘輸出０．０３２５水。
１ｍ＝１００ｃｍ
０．８ｍ＝８０ｃｍ
每秒鐘輸出：
２．６÷８０
＝０．０３２５
所以每秒鐘輸出０．０３２５水。
2007-08-25 12:56 am
The radius of the waterpipe = 2.6cm/2 = 1.3cm
Cross-sectional area of the waterpipe = (1.3)^2 8 pi = 1.69 * 22/7 = 5.3114cm^2
Volume of water emitted pre second = 5.3114 * 0.8 * 100 = 424.91 cm^3
2007-08-24 17:04:31 補充：
In second sentence, it should be typed as 1.3^2 * pi = 1.69 * 22/7 = 5.3114cm^2
Cross-sectional area of the waterpipe = (1.3)^2 8 pi = 1.69 * 22/7 = 5.3114cm^2
Volume of water emitted pre second = 5.3114 * 0.8 * 100 = 424.91 cm^3
2007-08-24 17:04:31 補充：
In second sentence, it should be typed as 1.3^2 * pi = 1.69 * 22/7 = 5.3114cm^2
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原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20070824000051KK03321