Convert the following into basic units:
(i) 28.7 pm
(ii) 15.15 pm
(iii) 25365 mg
(i) 1 pm = 10-12 m
28.7 pm = 28.7×10-12m
= 2.87×10-12m
(ii) 1 pm = 10-12 m
15.15 pm = 15.15×10-12m
= 1.515×10-12m
(iii) 1 mg = 10-3 g
1 mg = 10-6 kg
∴ 25365 mg = 25365×10-6 kg
= 2.5365×10-2 kg