Question

For measurement, each physical quantity is assigned SI unit such that meter for Distance. It
can be converted in different units by keeping prefix for power of ten. For example
10 meter = centimeter and 10 meter Kilometer and so on. Explain why do we need
different units for the same physical quantity?​

Answer 1

Answer:

For measurement, each physical quantity is assigned SI unit such that meter for Distance. It

can be converted in different units by keeping prefix for power of ten. For example

10 meter = centimeter and 10 meter Kilometer and so on. Explain why do we need

different units for the same physical quantity?

Answer 2

Answer:

we need small quantity to measure.

take an example

if we measure radius of atom we can take small unit coz atom is too small. so we can take micrometre picometer instead of kilometre centimetre metre. kM, M, CM, are used to for long distance.