promotion image of download ymail app
Promoted
Hello
Lv 6

Fluid mechanics

圖片參考:https://s.yimg.com/rk/HA00510450/o/857692524.jpg

Fluid mechanics

1 個解答

評分
  • 天同
    Lv 7
    6 年前
    最愛解答

    Density of oil = 0.85 x 1000 kg /m^3 = 850 kg /m^3

    Dynamic viscosity of oil = 850 x (3.53 x 10^-4) Pa-s = 0.3001 Pa-s

    Area of one slant side of prism = (0.2/cos(45)) x 2 m ^2 = 0.5657 m ^2

    Hence, viscous force acting on one slant side of prism

    = 0.3001 x 0.5657 x (0.15/h)

    Total viscous force acting on the two sides of prism

    = 2 x 0.3001 x 0.5657 x (0.15/h)

    Hence, 10 = 2 x 0.3001 x 0.5657 x (0.15/h)

    i.e. h = 2 x 0.3001 x 0.5657 x 0.15/ 10 m = 0.00509 m = 5.09 mm

    • Commenter avatar登入以回覆解答
還有問題嗎?立即提問即可得到解答。