Question

Define the physical quantity .write the si system of units​

Answer 1

Answer:

A physical quantity is a property of a material or system that can be quantified by measurement. A physical quantity can be expressed as a value, which is the algebraic multiplication of a numerical value and a unit. ... One is numerical magnitude and the other is the unit in which it is measured.

The four fundamental units we will use in this text are the meter (for length), the kilogram (for mass), the second (for time), and the ampere (for electric current). These units are part of the metric system, which uses powers of 10 to relate quantities over the vast ranges encountered in nature.

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Answer 2

Physical quantities are those that can be measured either directly or indirectly.

Explanation: The International System of Units defines the fundamental units as the units of fundamental quantities. We can derive all other units from these units because they are not dependant on any other unit.

The following are the seven basic units:

Mass – Kilogram (Kg)

Length – meter (m)

Time – second (s)

Amount of substance – mole(mole)

Electric current – ampere (A)

Temperature – Kelvin (K)

Luminous intensity – candela (cd)