Hello, I'm new here. I have a question that I don't think many people can answer. In my Engineering Design class last school year, we use physics on a daily basis. My teacher goes over units and where they come from. He also goes over fundamental measurements like mass and time. He stressed to us the difference between units and concepts, like how the unit for gravitational potential energy is the Joule (J) in the SI system, but the concept is represented by a capital U. Another example is the Coulomb (C) and (I think its concept is) Q. So after all that, what I'm asking is does anyone know all or most of the units and their matching concepts, or know of a chart that shows it? I've looked with no luck. Thanks.