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題目是這樣的: Vibration of water in a tube If 1 liter of water ( about 1.06 US quart ) is vibrating up and down under the influence of gravitation in a U-shaped tube of diameter 3cm. What is the frequency? Neglect friction. First guess. ____ ____ │ │ │ │ │ │ - -│--║- - - │ │ │ │ ↑y │ │ - -│ │- - - - - - - - - - - ( y = 0 ) │ │ │ │ ╞─┤- - - - - - -│ │ │ │ │ │ │ │_____________│ │ │ │ └─────────── 圖很醜請包容XD(第一次畫圖...) 謝謝大家的幫忙Orz -- "HARD WORK BEATS TALENT WHEN TALENT FAILS TO WORK HARD." -- ※ 發信站: 批踢踢實業坊(ptt.cc) ◆ From: 122.117.20.246 ※ 編輯: tanaka0826 來自: 122.117.20.246 (10/23 01:44)
tanaka0826 :藍色線就是水位 10/23 01:44