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Message: <blockquote data-quote="wsvperera" data-source="post: 2947654" data-attributes="member: 14935"><p>Oh !</p><p></p><p>Simple chemistry theory</p><p></p><p>They may <span style="color: Red"><strong>using colorless gas heavier than the Air</strong></span>, so it can maintain the pressure from the boat</p><p>Such as…</p><p></p><p><span style="color: Blue"><em>Sulfer Hexaflouride ( SF6 )</em></span></p><p> <span style="color: Blue"><em>IUPAC name     sulfur(VI) fluoride   </em></span></p><p><span style="color: Blue"><em>colorless, odorless gas</em></span></p><p><span style="color: Blue"><em>Consisting of six fluorine atoms attached to a central sulfur atom</em></span></p><p><span style="color: Blue"><em></em></span></p><p></p><p></p><p>But if you put some object with less Area   ex. Pen or Pencil</p><p>Simply it goes down</p></blockquote><p></p>

Verification: Hathara warak wissa keeyada? (Hathara wadi karanna 20)

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