Sam1235

Thank you very much! I was confused by the timing of pushing the button (Do I add it, multiply it or just press it?) but now I understand. Thank you very Much!

I thought It was the "ln" button on the windows scientific Calculator?

Hi All. So I know the Delta V Formula is ÃŽâ€v = Isp *ln(Total Mass/Dry Mass) But I always seem to come up with Incorrect answers, and I think that is related to not understanding to "ln" or logarithm. I have tried to read the Wiki on it, it is way too complicated for me, and I am not sure what to do with it in the calculation. Can Anyone simply explain what I have to do with it when Calculating Delta V?