From: David Lauter (dyakov@ix.netcom.com)
Date: Sun Feb 27 2000 - 16:17:44 PST
From: "David Lauter" <dyakov@ix.netcom.com> Subject: Re: Pinhole Digest #362 - 02/26/00 Date: Sun, 27 Feb 2000 16:17:44 -0800 Message-ID: <01bf8181$3c29cd40$6ae96ed1@dyakov.ix.netcom.com>
I think the important property of styrofoam in these experiments is its low
thermal conductivity, basically because styrofoam is mostly air. So one can
assume that styrofoam has a very small change in temperature. By the way, I
used to borrow a hand made thermocouple attached to a microvoltmeter which
could measure temperature of solid surfaces such as a leaf or styrofoam cup.
Two metals (I don't remember which two, but there the same metals as in an
oven's thermocouple) were soldered together so that the connection was only
about 2-4 mm. I don't remember the type of microvoltmeter that was used.
Does anyone out there know how to make this very handy and useful
instrument?
Farmer David
. . -----Original Message-----
From: Pinhole Listserv <pinhole@exploratorium.edu>
To: Pinhole Listserv <pinhole@exploratorium.edu>
Date: Saturday, February 26, 2000 12:20 AM
Subject: Pinhole Digest #362 - 02/26/00
Pinhole Digest #362 - Saturday, February 26, 2000
specific heat of styrofoam
by "Jeff Erickson" <jefferick@yahoo.com>
Re: pinhole specific heat of styrofoam
by <NFetter@aol.com>
----------------------------------------------------------------------
Subject: specific heat of styrofoam
From: "Jeff Erickson" <jefferick@yahoo.com>
Date: Fri, 25 Feb 2000 09:47:42 -0800 (PST)
I'm doing a calorimetry lab with styrofoam cups and
can't find a specific heat for polystyrene. I looked
in a CRC manual, but no luck. Can anyone help me on
this? Many thanks! ...Jeff Erickson
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