Question

Which of the following is NOT a dimensionless quantity? *
a. trigonometric functions
b. distance
c. pure numerical factors
d. exponential functions

Answer 1

Distance IS a dimensional quantity.

It has a unit which is metres or kilometres.

It can be expressed by [M^0 * L^1 * T^0]

The others cannot be expressed because they do not have a unit. They cannot be expressed in terms of mass, length or time.

Hope this helps.

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