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Re: [Phys-l] heat/energy



Anthony -

We take a tennis ball that's been filled with BB's and insert a thermocouple into it. We then drop the tennis ball repeatedly, and track the internal temp on a graph.

--
Michael R. Meyer
Lecturer/Lab Coordinator
Mich Tech Physics Dept.
mrmeyer@mtu.edu
906-487-2273


----- Original Message -----
From: "Anthony Lapinski" <Anthony_Lapinski@pds.org>
To: tap-l@lists.ncsu.edu, phys-l@carnot.physics.buffalo.edu
Sent: Thursday, January 28, 2010 7:34:52 AM GMT -05:00 Colombia
Subject: [Phys-l] heat/energy

I'm looking for some simple activities for a heat investigation/lab.
Specifically, when two objects collide, I want to show how kinetic energy
(loss) changes to work, sound, and heat. I thought about just hammering a
nail. They can clearly see the nail going into the wood and hear the
noise. I tried this (driving the nail about 1.5 cm), but could not really
sense a temperature change in the nail and hammer head. I then tried
pounding a lead brick with a sledgehammer, but both felt cool to the
touch. Maybe this has to be done for a longer time?

Does anyone have a demo/activity that "easily" shows a temperature rise
when two objects impact?

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