意思能看懂
问题描述：
意思能看懂
The mass of paint on a wide body aircraft is 207 Kg.During times of high fuel prices or fuel shortages,the suggestion is made to remove the paint from the airplanes as an energy saving strategy during take-off.The mass of these aircraft is 395,000 Kg.The planes typical fly at an altitude of 29 Km and at a velocity of 230 m/s.Determine the energy savings by removing the paint per take off.
答
如果去掉飞行器上的漆,飞行器的每次起飞可节省的能量是：节省的重力势能：Ep=mgh=207*10*29000= 6*10^7J节省的动能：Ek=1/2mv^2=1/2*207*230*230=5.5*10^6J每次起飞节省的总能量：E=Ep+Ek=6*10^7J+5.5*10^6J=6.55*10...还有两道题请帮我解答一下 谢谢题在哪呢？