Pira balon sing bisa diisi silinder helium?Contone, silinder gas helium 40L kanthi tekanan 10MPa Balon kira-kira 10L, tekanan 1 atmosfer lan tekanan 0.1Mpa 40*10/(10*0.1)=400 balon Volume balon kanthi a diameteripun 2,5 meter = 3,14 * (2,5 / 2) ...
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