Fieari wrote:This What-If is unique in that it provides a really cool end-result, while not being catastrophically destructive like the others. As such, I'd love to actually see this in real life, and I'm pondering how it could be done.
So... Construct a glass that is segmented with a thin-but-vacuum-resistant seal between the top and bottom halves. Fill the top half with water, and create a vacuum in the bottom half via a small hole and pump. Then, using a weight or something similar, shatter the seal between the two layers.
Would this work? Would it create the same physics situation as in the What-If?
What about something like this quick-and-dirty brainstorm and quicker-and-dirtier Google SketchUp, http://i45.tinypic.com/35m4jec.png? Call it a Munroe Glass, or somesuch.
_IF_ it would work, it would be reusable as a "physics-is-cool" demo and, minus the flying glass (potentially...), would be fairly safe.
So, running through things... The bottom is a screw-top glass vessel that is possibly custom-made, but could easily be 250mL Mason jars or dollar-store spice bottles. Next up is a mated screw-bottommed and screw-topped metal ring with a vacuum valve to allow a vacuum to be created. Between that and the third piece is a mylar sheet held taut when the third piece is screwed down. The third piece has a screw-bottom and along the side (opposite the valve as an attempt to help it not spin when/if it flies upwards) it has a spring-loaded arm with two bumps, a top one to hold piece four up and a bottom one to hold it down. Piece four is a heavy-ish cylinder that fits into three and is rimmed along the bottom with a blade.
So, screw the valve onto the glass jar, top with mylar and screw on the cup. Vacuum the air out of the jar, and fill the cup with water. Slide the cutter partially in and rest it on top of the prop. Attach a string to the prop and step back as far as desired, then pull. Cutter drops and is trapped as it cuts the mylar making the vacuum suddenly "appear". And then.... ?????
Now take that as it is, it took ALL DAY (well... a coffee break, part of lunch, perhaps a few minutes I should have been working.... you know, certain values of all...) to come up with it and I have no idea if it is feasible. But I'm sure someone here can say.