Natural Science
Undergraduate
求解
煙質點質量通常為 10 “kg 的數量級。
察到這些質點的布朗運動 ( 迅速、不
動起因於與空氣分子碰撞。(3)
賢點在 300 K 空氣中布朗運動的
用度下,在氮氣中的質點均方
人
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