Re: FAQ questions...

To: tesla-at-pupman-dot-com
Subject: Re: FAQ questions...
From: "Fred W. Bach, TRIUMF Operations" <music-at-triumf.ca>
Date: Wed, 10 Jul 1996 00:29:46 PST
Cc: music-at-triumf.ca
>Message-ID: <199607100441.WAA07004-at-poodle.pupman-dot-com>
>Date: Tue, 9 Jul 1996 22:41:15 -0600
>From: Tesla List <tesla-at-poodle.pupman-dot-com>
>To: Tesla-list-subscribers-at-poodle.pupman-dot-com
>Subject: Re: FAQ questions...

>FAQ questions...
>
>From Steve_Crawshaw_at_erith6-at-smtpgwy.supertension-dot-comTue Jul  9 22:28:19 1996
>Date: Tue, 09 Jul 96 16:30:42 GMT
>From: Steve_Crawshaw_at_erith6-at-smtpgwy.supertension-dot-com
>To: tesla-at-pupman-dot-com
>
>     My understanding is that about 10mA passing through the heart is 
>     lethal, I guess it is pretty hard to actually measure this without 
>     getting sent to prison:) Maybe someone could rig an ammeter up to Mr. 
>     Edisons' wonderfully humane chair.

   10 mA passing through the chest cavity.  It only takes microamps on
   the heart muscle itself.


>     A Watt in AC is RMS volts times amps, where RMS = the square Root of 
>     the Mean of the Square of the peak AC voltage.


   Yes, I neglected to mention RMS.  Thanks.

   Any sine wave (voltage, current, motion of a dot on a moving wheel,
   etc.) has a peak value and an RMS value.  For sine waves not
   centered on zero, the sine waves also have a meaningul *average*
   value known as the (DC) offset.

   A watt in AC is RMS volts times RMS amps times the cosine of the
   phase angle between them.  When it comes to voltage and current,
   all amplitude measurements of sinewave waveform are taken to be RMS
   measurements unless otherwise noted.  If I remember correctly, the
   RMS value of a sine wave is the peak value times 0.707  which is
   the reciprocal of the square root of two.

   [ snip ]

 Fred W. Bach ,    Operations Group        | Internet: music-at-triumf.ca
 TRIUMF (TRI-University Meson Facility)    | Voice:  604-222-1047 loc 6327/7333
 4004 WESBROOK MALL, UBC CAMPUS            | FAX:    604-222-1074
 University of British Columbia, Vancouver, B.C., CANADA   V6T 2A3
 "Accuracy is important. Details can mean the difference between life & death."
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 They do NOT necessarily reflect the views of my employer or fellow workers.