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In article <7c3o91h4vqs7b084ohljm6e2lqf0h18ksq@4ax.com>,
Karyudo <karyudo_usenet@yahoo.com.remove.me> wrote:
>On Sun, 29 May 2005 04:27:59 GMT, "Hugh Candlin" <No@MeansNo.Com>
>wrote:
>
>>"Karyudo" <karyudo_usenet@yahoo.com.remove.me> wrote:
>
>>> Unless I've screwed up big-time (it is 7am on a Saturday), 1.5 g on a
>>> 0.7 mm diameter area is about 5.5 psi. 1.5 g on a 0.7 mil diameter
>>> area is about 3500 psi.
>>
>>It will be milligrams.
>
>Uhh... what will be milligrams? Neither of the two possible diameters
>(0.7 mm or 0.7 mils) is measurable in units of mass.
>
>>Tip pressure on the record can be as high as several tons.
>
>"Tons" is not a unit of pressure. Tons is a unit of weight. PSI is a
>unit of pressure. And actually, I did make a mistake: turns out that
>1.5 g on a 0.7 mil (= 0.0007") diameter area is closer to 8500 psi.
>Or, if you prefer, 8.5 tons per square inch. That's some hellacious
>specific pressure, even if the actual force is low...
Actually wouldn't that be 4.25 tons per square inch?
I remember reading a long time ago about the forces of a stilleto
heel on women's shoes and the damage they do to asphalt based
flooring - linoleum or tile - because of the concentrated area.
Bill
--
Bill Vermillion - bv @ wjv . com
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