abstract:A physical constant is a physical quantity that is generally believed to be both universal in nature and constant in time. It can be contrasted with a mathematical constant, which is a fixed numerical value, but does not directly involve any physical measurement.
This paper analyses the physicalconstantconstructingbydimensionalmethod and introduces the importantmeanofdimensionof quantity inphysical constant constructing.
Whether David can withstand the sport's constantphysical demands to extend her career for a possible shot at 2020 Olympic glory remains to be seen, but few would deny her the opportunity.