• # question_answer 10)                 Express the number appearing in the following statements in standard form: (i) 1 micron is equal to $=\frac{1}{1000000}m$. (ii) Charge of an electron is 0.000,000,000,000,000,000,16 coulomb. (iii) Size of a bacteria is 0.0000005 m (iv) Size of a plant cell is 0.00001275 m (v) Thickness of a thick paper is 0.07

(i) $\frac{1}{1000000}\,m=\frac{1}{{{10}^{6}}}m$ $=1\times {{10}^{-6}}\,m$ (ii) 0.000,000,000,000,000,000,16                 Coulamb $=\frac{16}{100000000000000000000}$ $=\frac{16}{{{10}^{20}}}$ $=\frac{1.6\times 10}{{{10}^{20}}}\,=\frac{1.6\times {{10}^{1}}}{{{10}^{20}}}\,=\frac{1.6}{{{10}^{20-1}}}$ $=\frac{1.6}{{{10}^{19}}}=1.6\times {{10}^{-19}}\,\text{coulomb}$ (iii) $0.0000005\,m$ $=\frac{5}{10000000}$ $=\frac{5}{{{10}^{7}}}$ $=5\times {{10}^{-7}}\,mm$                 (iv) $0.00001275=\frac{1275}{100000000}$                 $=\frac{1275}{{{10}^{8}}}$ $=\frac{1.275}{{{10}^{8}}}\,=1.275\,\times {{10}^{-5}}\,mm$ (v) $0.07\,mm\,=\frac{7}{100}$ $=\frac{7}{{{10}^{2}}}$ $=7\times {{10}^{-2}}\,mm$.