Dimensional Analysis and Welding Costs

摘要

I first learned about dimensional analysis from my grandfather. He taught me a simple way to verify that mathematical calculations were done correctly: make sure the dimensions work out correctly. If the dimensions are wrong, then the numerical value is wrong too. I've never memorized equations for calculating welding costs-rather, I use dimensional analysis to figure them out. For this two-part feature, I'll use welding cost analysis to illustrate the principle of dimensional analysis; the same idea can be used for many computations.