22.c 23.a 24.a 25.b 26.a 2014-05-24 00:52:04 補充： 要問詳解或翻譯再做題問 2014-05-24 00:53:02 補充： 不過為何要醫科或物理系才能答? 2014-05-26 08:26:14 補充： C
在追逐獵物時，這些獵豹多半只用牠們全速的一半來跑。因為在較慢的速度下，牠們才能迅速地減速及再加速，好能應付獵物突然的急轉彎，才不致被獵物擺脫。 to top out = If a rate tops out, it reaches its highest level to fake out = to trick someone by...
...help passengers to balance their body in an accelerating/ decelerating train. 2012-02-25 17:26:30 補充： 一般這類吊環產品英文也有簡單叫hand ring...
...zero-gravity environment to show travelers what it means to accelerate and decelerate quickly. 在這高度,乘客即可離開座位,體驗一個展開1300公里(800英里)全方位的景色...
公路運輸和經濟危機 在2008 年 10 月進行的各項調查顯示在美國的貨運公司非常關注燃料成本和不確定的經濟因素。第三方物流公司被視為過度依賴零售，汽車，電子等行業為他們的貨運業務，三者之一受經濟衰退所苦，據汽車銷售報告在他們 15年來的最低點，而消費者支出持平。報告還...
By Newton's third law, the normal reaction force from the wall is 12 N. Thus, maximum possible static friction from the wall on the book = 12 x 0.6 = 7.2 N But since the book's weight is 0.5 x 9.8 = 4.9 N, the frictional force is 4.9 N...
a=dv/dt=-(3/2)v→ ∫(1/v)dv=-(3/2)∫dt→ ln(v)=-(3/2)t+c1 → v(0)=4代入求c1=ln(4) → ln(v)=-(3/2)t+ln(4)→ ln(v/4)=-(3/2)t→ v/4=e-(3/2)t→ v=4e-(3/2)t v=dx/dt=4e-(3/2)t → ∫dx=4∫e-(3/2)t dt→ x=-(8/3)e-(3/2)t +c2→ x(0)=0代入求c2=8/3→x=(8/3)(1-e-(3/2)t) v(2)=4e-3=0.2 m/s x(2)=(8/3)(1-e-3)=2.53 m …&hellip...
... under the floor. For mid and rear engines air is decelerated and pressurized in a diffuser, loses some pressure as it passes...
分類： > 2009年01月06日
