Question

how order of magnitude is determined

Answer 1

Explanation:

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

Order of Magnitude:- The class of scale or magnitude of any amount, where each class contains values of a fixed ratio (most often 10) to the class preceding it. For example, something that is 2 orders of magnitude larger is 100 times larger; something that is 3 orders of magnitude larger is 1000 times larger; and something that is 6 orders of magnitude larger is one million times larger, because 102 = 100, 103 = 1000, and 106 = one million