hi all, nigel
I think this is very useful site , http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html , I search "hyperphysics" in this forum before I post this site to insure no double thread(same site).
Good nigel if you find this site not good for this forum you may delete this thread.
I think this is very useful site , http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html , I search "hyperphysics" in this forum before I post this site to insure no double thread(same site).
Good nigel if you find this site not good for this forum you may delete this thread.
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