Yahoo奇摩 網頁搜尋

  1. ... concerning the moment of collision, all other factors can be omitted since the collision time is very very short. In a gernal speaking...

  2. ... is wrong. should be not ONLY for small value of a. I have omitted the letter ONLY.

  3. ...between the conducting sphere with that reference is 3V. The omitted reference point here should be set at r=infininty, potential there is zero. ...

  4. ... p.d. to that of the battery (your given answer has omitted this very important point). When there is a current flowing, a p...

  5. ...together. Just by taking the "weight" and "friction", but omitting the "normal reaction" would not form a closed force diagram ...

  6. ...system: T = 2π√(m/k) with m = m/2 and k = a4/b3 (the negative sign can be omitted since it just indicates that the acc. is opp. to displacement in shm...

  7. ...significant or too specific to be discussed in CE level, so many are omitted . Note that NO3 - migrates to the anode, but will never be...

  8. ...since the purple part and the blaick are both of length L/2, omit then as they don't affect the centre of mass(due to symmetry...

  9. 物理學上必須在比較理想的狀態,故在兩物體相撞的情況下,必將一些如空氣阻力(以免速度減慢)、兩物體的表面平滑(以免摩擦力減慢速度)而堅硬(以免吸收其能量)等條件假設不考慮,則單單只計算 momentum比較簡單。

  10. 1) Consider: v = u + at u = v - at --- ( 1 ) s = ut + 0.5at^2 --- ( 2 ) Put ( 1 ) into ( 2 ), s = ( v - at )( t ) + 0.5 at^2 s = vt - at^2 + 0.5at^2 s = vt - 0.5at^2 ( 2 ) From the above, 58 = ( 12 )( 3 ) - ( 0. 5 )( a )( 3^2 ) 4.5a = -22 a = -4.89 m / s^2 ( cor. to 3 s.f. ) By v = u + at...