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Magnetic field (view source)

Revision as of 21:26, August 24, 2007

444 bytes added ,  21:26, August 24, 2007
added point about young v. old earth
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'''Magnetic Fields''', also known as B-fields, are force fields caused by relativistic effects of electric currents. Magnetic fields only exert a force on moving charges.
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'''Magnetic Fields''', also known as B-fields, are force fields that can be explained by [[relativistic]] effects of [[electric current]]s. Magnetic fields only exert a force on moving [[charge]]s.
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The magnetic field of [[Earth]] is directional nearly north-to-south.  This field has been decaying at a rapid rate of about about 5% per century, which casts doubt on the theory that the [[Earth]] is billions of years old.<ref>K.L. McDonald and R.H. Gunst, ‘An analysis of the earth’s magnetic field from 1835 to 1965,’ ESSA Technical Report, IER 46-IES 1, U.S. Govt. Printing Office, Washington, 1967.</ref>
    
== References ==
 
== References ==
 
<references/>
 
<references/>
 
[[category:physics]]
 
[[category:physics]]
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