On Sunday 02 April 2006 01:47, Mike Millet wrote: > Is the bar an SI unit? or is it one that was adopted into SI? Would it be > correct from a metric engineering standpoint to use the bar or would Pascal > be correct :)?
It's neither SI nor CGS (the CGS unit is the barye, which is a microbar). 1 bar = 100 kPa. I see no reason to keep the bar. Unlike the are and liter, to which you can add prefixes and get finer unit spacing than by prefixing the square or cubic meter, the bar gives the same unit spacing as the pascal. Calculating with bars requires multiplying or dividing by 10^5. And my experience at the bicycle store, where some tires have pressures marked in both kPa and bar, is that bicycle salesmen can't handle bars. phma
