To measure a physical quantity correctly and need to compare it with some standard quantities. Thus a standard unit is needed to measure a quantity correctly.
The standard unit to measure mass is kilograms.
Hertz.
Standard International unit (SI unit)
Ounces or Grams
is meant by measurement in che mistry
To measure a physical quantity correctly and need to compare it with some standard quantities. Thus a standard unit is needed to measure a quantity correctly.
The standard unit to measure mass is kilograms.
A second.
grams
Hertz.
Standard International unit (SI unit)
degrees, minutes and seconds. (and radians are also a standard unit of angular measure).
A unit of measure is an officially standard used to make measurements.
There is not a standard SI unit to measure sphericity.
Metre
Meter or Centimeter