Question

what's diff between unit and a dimention? (and plz don't copy from internet or you'll be reported and ill not follw you...!!)​

Answer 1

Answer:

Background: Initially I thought that the terms-unit and dimension, refer to the same thing. Physical quantities are categorised into fundamental/basic physical quantities and derived physical quantities. A fundamental physical quantity cannot be broken down into simpler physical quantities, cannot be obtained from other fundamental quantities and all the known physical quantities can be obtained using fundamental quantities. There was a line in my book which stated

Mass, length, time, thermodynamic temperature, electric current, amount of substance, luminous intensity are the seven fundamental quantities and are often called the seven dimensions of the world. Thus the dimension of mass is [M], that of length is [L] and so on. The dimensions of a derived physical quantity are the powers to which the units of the fundamental physical quantities have to be raised in order to represent that derived physical quantity completely.

This is very confusing and I am finding it difficult to understand the difference between the two terms-dimension and unit.

Answer 2

Answer: UNIT : It is a name given to a physical quantity so as to describe it or to understand it easily . Example: gram , kilogram is the unit of mass.

                                                AND

DIMENSION : dimensions of every quantity can be expressed but only by different formulas of dimensions of seven fundamental quantities. Example: [M] is the dimension of mass .

HOPE IT HELPS U AS IT IS NOT COPIED FROM GOOGLE AND IF YOU FIND IT APPROPRIATE THEN PLZZ MARK ME AS BRAINLIEST......!!!!!