Question

Explain this statement clearly:
“To call a dimensional quantity ‘large’ or ‘small’ is meaningless without specifying a standard for comparison”.
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Answer 1

Explanation:

The given statement is true because a dimensionless uantity may be large or small in comparision to some standard reference. For example, the coefficient of friction is dimensionless. The coefficient of sliding friction is greater than the coefficient of rolling friction, but less than static friction.

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Answer 2

Explanation:

To call a dimensional quantity large or small is meaningless without specifying a standard for comparison. ... The given statement is true because a dimensionless quantity may be large or small in comparision to some standard reference. For example, the coefficient of friction is dimensionless.