Question

The correct conversion of the following into basic units.
(i) $28.7\, pm$
(ii) $15.15\, \mu s$
(iii) $25365\, mg$

• A. (i) $\rightarrow 28.7 \times 10^{-11} m$, (ii) $\rightarrow 1.515 \times 10^{-6} s$, (iii) $\rightarrow 2.5365 \times 10^{-3} kg$
• B. (i) $\rightarrow 2.87 \times 10^{-11} m$, (ii) $\rightarrow 1.515 \times 10^{-5} s$, (iii) $\rightarrow 2.5365 \times 10^{-2} kg$
• C. (i) $\rightarrow 2.87 \times 10^{-10} m$, (ii) $\rightarrow 1.515 \times 10^{-5} s$, (iii) $\rightarrow 2.5365 \times 10^{-3} kg$
• D. (i) $\rightarrow 2.87 \times 10^{-10} m$, (ii) $\rightarrow 1.515 \times 10^{-6} s$, (iii) $\rightarrow 2.5365 \times 10^{-2} kg$

Answer 1

Answer: (B)

(i) $28.7\, pm \times \frac{10^{-12} m }{1\, pm }=2.87 \times 10^{-11} m$
(ii) $15.15\, \mu s \times \frac{10^{-6} s }{1\, \mu s }=1.515 \times 10^{-5} s$
(iii) $25365\, mg \times \frac{1\, g }{1000\, mg } \times \frac{1\, kg }{1000\, g }$ $=2.5365 \times 10^{-2} kg$