離地面愈高
空氣愈稀薄->空氣阻力愈小
重力加速度愈小->重量愈小
那麼火箭要成功衝出地球的困難點到底在哪?
是因為要脫離地球自轉的束縛嗎?
PS.外包裝我當然也知道要抗熱抗寒抗衝擊…
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◆ From: 61.230.224.65
※ 編輯: maw 來自: 61.230.224.65 (04/06 13:41)
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