The pressure of wind, P, on a plane surface varies jointly as the area of the
surface, A, and the square of the wind's velocity, V. The pressure on a square
metre is 1 kg when the wind is moving at the rate of 15 km/h; find the velocity of
the wind when the pressure on a plane surface of 45m^2 is 20kg.
variation
2010-10-03 8:53 pm
回答 (1)
2010-10-03 9:24 pm
✔ 最佳答案
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2010-10-03 13:37:00 補充：
其實題目中的 "a square metre" 正是指 A = 1。
有問題歡迎提出。
參考: My Maths knowledge
收錄日期: 2021-04-13 17:33:00
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20101003000051KK00619