Good, I'm not a rocket scientist. Did Chris just say it's spinning at 23.26 miles per hour? Now the trick is to get a CD in to space using an off the shelf CD drive ;-) Sam. Chris Schumann wrote: >>From: Adam Maloney <adamm at sihope.com> >> >> > > > >>Yes, it's very true. I'm no physics geek, but at 52x the angular >>velocity (?) is great enough to tear CD's apart. I forget the numbers, >>but basically you've got some ridiculous amount of force at the outer >>edge of the disc, basically trying to pull it apart. At 52x (or even >>48x) with a flimsy disc (low quality, weak, defective, or broken >>somehow), this is likely to happen. >> >> > >You may not be, but there should be quite a few on the list. Let's do >some math! > >Audio CD's start at 500 RPM and slow down to 200 RPM. That's 1x. >The fast drives go CAV at one speed, and are fastest at the end of >a disc, so let's go with 52x200 or 10,400 RPM. > >The speed of the edge of a disc v=wr which is the rotational >speed times the radius, or 10400RPM * 6cm or 62400cm/min or >(uhm... times 1min/60s times 1m/100cm) 10.4m/s (!) or >62400 cm/min (times 60min/1hr times 1mi/160934cm) = 23.26 mph. > >CD's have a mass of about 20g. A 1g chunk at 10.4m/s should >have 1/2 * m * v * v energy or about 1/20 (need help with unit >here...) joule? Or the same energy as a kilogram dropped from >a height of 5.5mm. (U = mgh) > >Still, I wouldn't want it headed for MY eye. > >Chris > > >_______________________________________________ >TCLUG Mailing List - Minneapolis/St. Paul, Minnesota >http://www.mn-linux.org tclug-list at mn-linux.org >https://mailman.real-time.com/mailman/listinfo/tclug-list > > > _______________________________________________ TCLUG Mailing List - Minneapolis/St. Paul, Minnesota http://www.mn-linux.org tclug-list at mn-linux.org https://mailman.real-time.com/mailman/listinfo/tclug-list