Question

what is meant by measurement
what do you understand by term unit
what are 3 requirements for selecting a unit of a physical quantity​

Answer 1

Answer:

measurement is process of comparing a given physical quantity with a known standard for the day of same nature

unit is quantity of constant magnitude which is used to measure the magnitude of other quantity of same nature

three requirements for selecting a unit of physical quantity are

convenient size

unit should be reproducible

the value of unit should not change with space and time

it should be possible to define the unit without ambiguity