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轉學考-工程力學
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88年 - 88 淡江大學 轉學考 工程力學#56168
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♦ , 2. Determine the components of the forces acting on each member of the pin-connected frames shown in Fig. 2. (25%)
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2. The forward rate constant for the elementary reaction C2H6(g)→ 2 CH3(g) is 0.00157 s-1 at 1000 K. What is the rate constant for the backward reaction at this temperature ? For CH3(g) and C2H6(g) the standard Gibbs free energies of formation are 159.74 kJ/mol and 109.55 kJ/mol, respectively, at 1000 K.
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3. An ideal gas expands isothermally at 27 °C into an evacuated vessel so that the pressure drops from 10 to 1 bar. Calculate the change in thermodynamic quantities q, w, △H, △S and △G for one mole of the gas. Note the process described is an irreversible one.
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4. A gas follows the equation of state P(V-b) = RT, where V is the molar volume. P,V, R,T and b are in SI units. Given that b = 0.039 dm3/mol, estimate the fugacity of the gas at 298 k and 50 bar.
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1. A 10 kg uniform ladder 25 m long rests against a smooth wall as shown in Fig* L An 80 kg man S climbs up the ladder to a point A,- a distance I＞2.0 m from the bottom of the ladder, before the I ladder slips. What is the coefficient of friction between the ladder and the ground if the angle 1 between the ladder and ground is 60° ? (25%
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* ♦ • 3. For the beam shown in Fi g, 3, find (a) the shear force and bending moment at x = 4 ft and x =10 ft 1 (10%)
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(b) draw the shear diagram and moment diagram for the beam. (15%) |
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4. The state of stress of an element is shown in Fig. 4(a). Use Mohr’s circle to determine the stresses I on planes forming angles of 30 degrees with the x and y axes as shown in Fig‘ 4
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(b)
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請寫一封信給淡大歷史學系的老師們，談一談你(妳)應試這門「世界通史」的心路歷程與心得。書寫此信的目的，在於幫助閱卷先生明白你(妳)對本科目的瞭解(廣度與深度)，以及感受你(妳)目前與歷史知識間的相互影響。 此外，字裡行間若能流露你(妳)對自己、對人類世界，以及對宇宙的情感與觀點，也是有趣地揭露出你(妳)對「世界通史」的另類交流。 希望這個考題不會太為難你(妳)，就隨心而寫吧。(100%)
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一 、中國歷史上不乏雄圖大略的君主，他們起用軍隊勤遠略，大興干戈拓疆土 。試就你所知，舉出不同朝代的皇帝各一人爲例，陳述其相關事蹟，並根據史事，評論他們對本國內部及周邊民族的功過得失與影響。（ 25分）
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