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  1. ...參考:http://www.physics.hku.hk/~nature/CD/ framed _c/imgs/gifs/dot.gif 宇 宙 學...參考:http://www.physics.hku.hk/~nature/CD/ framed _c/lecture/ch19/imgs/gal_pos.gif ...

  2. ...相對論的基本精神正正是: 1. 世界上沒有絕對的 reference frame 2. 也沒有絕對的時間尺度 既然世上沒有絕對的 reference...r 留心以上算式的表達,基本上全都是 primed frame 和 unprimed frame 之間的測量結果,也就是兩個觀察者之間...

  3. I presume that the wooden frames are at the two ends of the beam. At equilibrium, upward ...

  4. Since the velocity of an object is relative to different frame refernces, its KE is of course also relative to different...

  5. ... It is clearly that, given the geometry of the triangular wire frame , the increase in area of the frame when entering the magnetic field increases...

  6. ...that velocity. Kinetic energy for single objects is completely frame -dependent(relative). For example, a bullet racing by a non-moving...

  7. ...not desirable. My opinions as follows: 1. If the metal frame 's wire were bold, it need to re-mold, the mold fee probably about RMB...

  8. If you are looking at the water from its own frame of reference, the water experiences a centrifugal force (離心力) that tends...

  9. ... is a result of Lorentz symmetry. Two inertial reference frames O and O' (think of two observers with a relative velocity...

  10. ...ii) all laws of physics are the same in any inertia reference frame . Einstein published his result in a paper "On...

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