Question

define measurement, physical quantity and fundamental unit

Answer 1

Measurement is an act of measure physical quantity.
Physical quantity:- Those quantity which can be measured by any mean of method is called physical quantity.for example mass can be measure by weighting machine
Fundamental units:Those quantity which cannot be derived from another physical quantity is known as fundamental physical quantity and unit of those quantity is known as fundamental units. for example sec unit of time,Hertz unit of freequency

Answer 2

Answer:

A physical quantity is a physicalproperty of a phenomenon body or substance that can be quantified bymeasurement. A physical quantity is always measured of natural non living objects . These quantities aremeasured accurately. The SI base unitand their quantities are : The meter for length.

Measurement is the assignment of a number to a characteristic of an object or event, which can be compared with other objects or events. The scope and application of measurement are dependent on the context and discipline. ... The science ofmeasurement is pursued in the field of metrology.

A base unit is a unit adopted for measurement of a base quantity. A base quantity is one of a conventionally chosen subset of physical quantities, where no quantity in the subset can be expressed in terms of the others