Date: Fri, 12 Mar 1999 10:25:23 -0600 (CST)
Subject: Re: Boyled Marshmallows
We don't do this demo, but I think it would be a matter of rate rather
than ultimate pressure. You need to expand the air trapped in the
marshmallow before it has a chance to leak out. That means a fast pump
and/or small bell jar. To get really fancy you could pump out a
reservoir and then quickly open a valve to a smaller chamber with the
marshmallow. Maybe add some patter about explosive decompression of
the space station?
> >I have seen the Boyled marshmallows demo performed in such a way that
> >the marshmallow expand dramatically and even make a mess of the bell
> >jar. I have been unable to reproduce anything even remotely so
> >dramatic. Do you use a supercharged vaccuum pump?
> >I would really appreciate any suggestions.