>Of Philip S Hall >On the point about the calculation Pierre you probably lost most (probably >all) of them when you (correctly of course) expressed the weight in >micronewtons.
Weight is an old word is ambiguous. It has several meanings, one of which is a synonym for mass. ************************************* http://physics.nist.gov/Pubs/SP811/sec08.html In commercial and everyday use, and especially in common parlance, weight is usually used as a synonym for mass. Thus the SI unit of the quantity weight used in this sense is the kilogram (kg) and the verb "to weigh" means "to determine the mass of" or "to have a mass of." Examples: the child's weight is 23 kg the briefcase weighs 6 kg Net wt. 227 g ...atomic weight and molecular weight ... have been replaced by the equivalent but preferred terms relative atomic mass ... and relative molecular mass *************************************
