From: Ellen Koivisto & Gene Thompson (offstage@earthlink.net)
Date: Thu Nov 06 2003 - 17:58:20 PST
Date: Thu, 6 Nov 2003 17:58:20 -0800 Subject: Re: pinhole Boiling of water From: Ellen Koivisto & Gene Thompson <offstage@earthlink.net> Message-Id: <DCB89AF4-10C5-11D8-9310-000A959C38A8@earthlink.net>
All you need is a syringe, minus the needle. Put a little water in it,
make sure there's air in it as well, put your thumb or finger over the
opening at the tip (where the needle would be if it had a needle -- but
it doesn't) and then slowly pull the plunger up. The water boils and
it's clearly at about room temp. Qualitative, not quantative, but
cool. I have a parent who's a vet who got us loads of different
syringe sizes. Warn students not to let go of the plunger. It'll snap
back down fast enough to hurt.
Ellen Koivisto
SOTA, San Francisco
On Thursday, November 6, 2003, at 05:13 PM, JLEET@prodigy.net wrote:
> Hello,
>
> Does anyone know if there is a way to simulate a low
> pressure environment, so that one could show the
> lowered boiling point of water?
>
> Also, does one need to achieve zero atmosphere to make
> water boil without raising its temperature?
>
> Thank you very much.
>
>
>
>
>
>
> -----------------------------------------------------------------------
> ----
>
> To unsubscribe from pinhole, send an email to
> requests@exploratorium.edu
> with the words 'unsubscribe pinhole' (without the quotes) in the
> SUBJECT
> of the email.
>
> To subscribe to the digest and only get 1 combined message a day, send
> an
> email to requests@exploratorium.edu with the words 'subscribe digest
> pinhole' (without the quotes) in the SUBJECT of the email.
>
> Check out what your colleagues have written on Pinhole in the Pinhole
> archives at: http://saturn.exploratorium.edu/ti/alumni/pinhole.html
> -----------------------------------------------------------------------
> ----
>
>
This archive was generated by hypermail 2.1.3 : Mon Aug 02 2004 - 12:05:32 PDT