Title Text:I got banned from the county fair for handing out Helium-2 balloons. Apparently the instant massive plasma explosions violated some local ordinance or something. Origin:https://xkcd.com/2649/ https://www.explainxkcd.com/wiki/index.php/2649:_Physics_Cost-Saving_Tips 物理学省钱小妙招 我由于分发氦2气球被禁止进入县展销会，很显然这种瞬间大范围等离子体爆炸违反了当地法规之类的。 注释： 1. “免费电子”原文为 free electrons，”free”… Read more