Question

why are physical quantities expressed in order of magnitude?

Answer 1

The order of magnitude of a physical quantity is its magnitude in powers of ten when the physical quantity is expressed in powers of ten with one digit to the left of the decimal. Two numbers of the same order of magnitude have roughly the same scale- the larger value is less than ten times the smaller value.

Answer 2

Explanation:

any number can be written as the product of a number between one and ten,and a number which is power of ten.For example:-order of magnitude of diameter of sun is 10^9m.Similarly,order of magnitude of diameter of hydrogen atom is 10^-10m.

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