Question

Convert the following into basic units:

1. 28.7 pm
2. 15.15 pm
3. 25365 mg

Answer 1

(i) 28.7 pm:
1 pm = 10-12 m
∴ 28.7 pm = 28.7 × 10-12 m
= 2.87 × 10-11 m

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(ii) 15.15 pm:
1 pm = 10-12 m
∴ 15.15 pm = 15.15 × 10-12 m
= 1.515 × 10-11 m

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(iii) 25365 mg:
1 mg = 10-3 g
25365 mg = 2.5365 × 104 × 10-3 g
Since,
1 g = 10-3 kg
2.5365 × 101 g = 2.5365 × 101 × 10-3 kg
∴ 25365 mg = 2.5365 × 10-2 kg