Eighty zett(o)amps-metres squared?  The magnetic flux of the earth should be
in webers, which is amp henrys.  This would also be a tesla metre squared.
Magnetic field intensity is measured in amps per metre.  I don't recognize
this unit of amp metre squared (Am^2) at all.

What are you getting at?


John


 -----Original Message-----
 From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On
 Behalf Of John Tauxe
 Sent: Friday, 2000-11-10 15:40
 To: U.S. Metric Association
 Subject: [USMA:9115] SI units test!


 OK, folks.

 Here's a little test to see if you're a real SI geek!
 What does the following expression represent:

                         80 ZA-m^2

 Hint: This is roughly the strength of the earth's magnetic field.

 Write out the answer in words.

 - John

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