On Sunday 30 March 2008 11:13, Martin Vlietstra wrote: > I did not look at the original e-mail. However looking that the e-mail > chain now, I feel that the relationship between Btu and therms and their > respective SI counterparts should be given to a few more decimal places, > otherwise the Btu and therm will appear to be SI-friendly. > > > > 1 Btu = 1.055 kJ > > 1 therm = 0.1055 GJ
Ditto the acre. It is 4046.86 m² in states which use the international foot and 4046.87 m² in states which use the US survey foot, not 4000 m². Pierre
