0.199 V and 0.693 mA correspond to an impedance of about 300 ohms. For the human body we often use about 1,500 ohm as a model. So I wonder if the cows' problem stems from the fact they are relatively good electrical conductors.
Sincerely, Gary Tornquist Director of Product Safety Microsoft Corp. 425-705-6099 From: [email protected] [mailto:[email protected]] On Behalf Of [email protected] Sent: Wednesday, December 12, 2007 7:35 AM To: [email protected] Subject: Re: stray voltage ??? Thinker??? It could well be that those were results when the researchers averaged the numbers, or in the case of the sensitive beast, the readings on the meters at that instant. But I agree that it is meaningless precision. While I don't know about voltages and currents this low, I think there is a good case to be made for cows being sensitive to a volt or two. I have "tasted" 1.5 volts from a dry cell (positive side on the tongue, wet finger on the negative side). A transistor radio battery (9 volts with both terminals against the tongue) is just about unbearable. A cow stands on and eats off the ground. All that would be needed is a volt or two difference between the hooves and the mouth. Don Borowski Schweitzer Engineering Labs Pullman, WA, USA John Woodgate <[email protected]> wrote on 12/11/2007 11:03:55 PM: > In message > <[email protected]>, > dated Tue, 11 Dec 2007, "Tarver, Peter" <[email protected]> > writes: > > >According to one link I reviewed (again) from strayvoltage.org, cows > >are very sensitive: "0.199 volts and 0.693 mA electrical current was > >mildly shocking and 0.272 volts (.964 mA) resulted in distinct shock > >reactions in one cow." > > The precision claimed for these is not sensible, so throws doubt on the > whole claim. - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc - This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. Website: http://www.ieee-pses.org/ To post a message to the list, send your e-mail to [email protected] Instructions: http://listserv.ieee.org/request/user-guide.html List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas [email protected] Mike Cantwell [email protected] For policy questions, send mail to: Jim Bacher: [email protected] David Heald: [email protected] All emc-pstc postings are archived and searchable on the web at: http://www.ieeecommunities.org/emc-pstc
