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  1. ...force. The reaction force, given by the ejected water to the rocket, propels the rocket to go up. (Newton's Third Law of Motion...

  2. Increase in velocity of airplane after 9 s = (1050 - 1000) km/h = 50 km/h = 13.89 m/s Hence, increase in momentum of airplane = 10 000 x 13.89 kg.m/s = 1.389 x 10^5 kg.m/s Net force acting on the airplane during ignition of rocket units = [2 x 8000 + T - (R+ dR)] = 16000...

  3. ...interaction gives rise to a force (known as Lorentz force) that propels the electrons to move along the rod in a certain direction. This ...

  4. .... The success of these products and services propelled Apple to become the world's most valuable publicly traded company in...

    分類:社會及文化 > 語言 2012年12月14日

  5. 1.rising tide of prosperity 社會日益富裕的趨勢 / 大勢2.The sustained burst of personal spending 個人銷費不停膨脹 3. tricky task - 難辦的任務 4.efforts to check inflation 控制通脹的努力 5.damn-the-expense, damn-the-high-cost-of-living buying spree 懶理...

    分類:社會及文化 > 語言 2011年11月17日

  6. ...for a few passengers Sail boat – a vessel with large sails propelled by wind Submarine – a motorized vessel that can travel under water

  7. ... Heat causes air to expend in the chamber (炮膛) to propel the cannon ball--KINETIC ENERGY The cannon ball goes...

  8. ... will turn the tumbler back to its upright position. 4. Water rocket propels because of the reaction force produced by the ejecting water. There...

  9. ...there is no vertical speed, but there is an horizontal speed of 52 m/s which propels Q to move throughout the whole journey. Hence, Q is ...

  10. .... Seahorses beat their dorsal fins back and forth to propel themselves through the water in an upright position. The food that ...

    分類:社會及文化 > 語言 2010年10月01日