NOW LIVE! Today's the day you meet your new best friend. You don’t have to leave Wolfy behind... In 'Pets & Sidekicks' your companions level up with you!

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Message: <blockquote data-quote="Impeesa" data-source="post: 2241436" data-attributes="member: 498">Well, just moments before the picture was taken, the garbage can had a few things in it: at the bottom was a 2L pop bottle filled to about 1/3 with liquid nitrogen and duct taped to some rocks (so it would sink), and the rest was full of water with a bit of dish soap to make it foam up more when it exploded. A little simple thermodynamics will lead you to conclude that the pop bottle will not remain intact for very long - as the nitrogen boils away, the pressure builds up until it bursts at the seams. That gives you a pretty nice fountain as the garbage can is emptied of all its water. Sometimes it's enough to blow the garbage can open at the seams, too. More fun facts: When I did that, it was for a science camp - we did classroom visits during May and June to promote the program (the one I did also involved bottle rockets, and imploding a paint can by cooling it with the liquid nitrogen). On more than one occasion, we returned to a school a week or two later to do another demonstration for a different class, and found perfect circles of dead grass where the previous demonstration had been done. Our best guess was that the shockwave was killing off the roots of the grass or something. <img src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f642.png" class="smilie smilie--emoji" loading="lazy" width="64" height="64" alt=":)" title="Smile    :)"  data-smilie="1"data-shortname=":)" />--Impeesa--</blockquote>

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