What is coherent system of units

1.	What is coherent system of units
Answer» Coherence\xa0(units\xa0of measurement) ... A\xa0coherent\xa0derived\xa0unit\xa0is defined as a derived\xa0unit\xa0that, for a given\xa0system\xa0of quantities and for a chosen set of base\xa0units, is a product of powers of baseunits\xa0with no other proportionality factor than one.

Discussion