(b) 38.1 ft/s to miles/h. (5%)

【已刪除】3. 一台太空梭如下圖所示，假設因為空氣阻力造成太空梭的減速率為g = 6x10-5v2 m/sec2， 其中v為太空梭的速率。若在太空梭於v= 120 m/sec時關閉引擎，請求得太空梭在速率減至 v = 60 m/sec時太空梭滑行的距離。（20 %)

【已刪除】4.有一個三連桿機構如下圖所示，AB桿長1 m、BC桿長2 m、CD桿長3 m，AB桿以角速 度1j繞少軸旋轉，BC桿相對於AB桿的角速度為2i，而CD桿相對於BC桿的角速度為3k， 請求得圖示瞬間D點的絕對速度。（20 %)

【已刪除】5. 一根鋼桿( E= 30✖l06 psi)如下圖所示，其直徑為0.85 in，在製造過程中必須獲得100 in-lb 的彈性應變能，若假設永久變形的安全係數為5，請求得該鋼桿材料的降伏強度。（20%)

(a) 3 weeks to milliseconds. (5%)

(c) 554 m4/(day.kg) to cm4/(min.g). (5%)

(d) 32 lbftoN. (5%)

(a) Calculate the ratio (lb-mole O2 react/lb-mole NO formed). (5%)

(b) If ammonia is fed to a continuous reactor at a rate of 100.0 kmol NH3/I1, what oxygen feed rate (kmol/h) would correspond to 40.0% excess O2? (5%)

(c) If 50.0 kg of ammonia and 100.0 kg of oxygen are fed to a batch reactor, determine the limiting reactant (5%), the percentage by which the other reactant is in excess (5%), and the extent of reaction (mol) (5%) and mass of NO produced (kg) if the reaction proceeds to completion (5%).

3. The Reynolds number is a dimensionless group defined for a fluid flowing in a pipe as Re = Duplfi where D is pipe diameter, u is fluid velocity, p is fluid density, and fj, is fluid viscosity. When the value of the Reynolds number is less than about 2100, the flow is laminarthat is, the fluid flows in smooth streamlines. For Reynolds numbers above 2100, the flow is turbulent, characterized by a great deal of agitation. Liquid methyl ethyl ketone (MEK) flows through a pipe with an inner diameter of 2.067 inches at an average velocity of 0.48 ft/s. At the fluid temperature of 20°C the density of liquid MEK is 0.805 g/cm and the viscosity is 0.43 centipoise [ 1 centipoise = 1 cP = 1.00✖ 10-3 kg/(m-s)]. Determine whether the flow is laminar or turbulent. Show your calculations. (25%)