Question

define fundamental and base quantities

Answer 1

Answer:

Quantities independent of other physical quantities are know as fundamental physical quantities.

There are 7 fundamental physical quantities.

Length.

Mass

Time

Electric current

Thermodynamic temperature

Amount of substance

Luminous intensity

Answer 2

Answer:

Measurement of any physical quantity involves comparison

with a certain basic, arbitrarily chosen, internationally

accepted reference standard called unit. The result of a

measurement of a physical quantity is expressed by a

number (or numerical measure) accompanied by a unit.

Although the number of physical quantities appears to be

very large, we need only a limited number of units for

expressing all the physical quantities, since they are interrelated with one another. The units for the fundamental or

base quantities are called fundamental or base units. The

units of all other physical quantities can be expressed as

combinations of the base units. Such units obtained for the

derived quantities are called derived units. A complete set

of these units, both the base units and derived units, is.

known as the system of units