> Sid Bennett in USMA 16118 said: > >> I must admit that it is 30 years since I was a geophysicist, but at >> that time the earths magnetic field was expressed in Gauss.
My physics book states that the earth's magnetic field is approximately10^-4 T (where T is the SI symbol for teslas). It goes on to note that this is 100 microteslas (writing the unit in apropriate SI symbols by using the symbol mu for micro, which I cannot reliably transmit via email). It also makes note of the gauss with the statement: "An earlier (non-SI) unit (for magnetic field), still in common use, is the gauss (G), and 1 tesla = 10^4 gauss." The unit tesla is used for most discussion and problems involving magnetic fields although an occassional problem is done using gauss (by simply converting to or from teslas). I studied this some 40 years ago, but my physics book is only 5 years old. Regards, Bill Hooper ============ Keep It Simple! Make It Metric! ============
