Define a derived unit.

Define standard metre.

Complete the following —

1. 1 light year = m
2. 1 m = Å
3. 1 m = µ
4. 1 micron = Å
5. 1 fermi = m

Complete the following —

1. 1g = kg
2. 1mg = kg
3. 1 quintal = kg
4. 1 a.m.u (or u) = kg