How useful is Helmet's equation for the acceleration due to gravity?
How did Helmet derive it?
I need any and all background information on the equation or Mr. Helmet.
Are you sure you have the name right? I have never heard of a Helmet,
or Helmet's equation... Where did you find this? Has any body
else heard of Helmet?
Do you suppose he means Helmholtz?? If so, I do not know of any
equation related to him that deals with the acceleration due to gravity.
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Update: June 2012