Q.4 Show that prefix micro is thousand times smaller than prefix milli.

Ans:
To show that the prefix “micro” is a thousand times smaller than the prefix “milli”, we can look at the definitions of these prefixes according to the International System of Units (SI).
The prefix “milli” (symbol: m) represents 10-3  or  1/1000 of a unit.

The prefix “micro” (symbol: μ) represents 10-6 or  1/1000000 of a unit.

To find out how many times smaller “micro” is compared to “milli”, we can divide the value of “milli” by the value of “micro”:
10-3 / 10-6

When you divide fractions, you multiply by the reciprocal of the denominator:
= 1/1000 x 1000000/1
=  100000/1000

= 1000
Therefore, the prefix “micro” is 1,000 times smaller than the prefix “milli”.