Terry Simpson asked in USMA 22908:
So I understand that you mean that SI is a subset of metric. Where do you get this definition from? What makes something metric and non-metric?
If a unit is defined as some combination of SI base units and powers of ten it is a metric unit. If no powers of ten are involved it is an SI derived unit.
Joseph B. Reid
17 Glebe Road West
Toronto M5P 1C8 Telephone 416-486-6071
