Question

Please solve the question in the copy​
Step by step solutions

Answer 1

$\\ \tt \longmapsto \: \frac{2 \times 1}{1.6 \times {10}^{ - 19} } \\ \\ \tt \longmapsto \: \frac{2}{1.6 \times {10}^{ - 19} } \\ \\ \tt \longmapsto \: \frac{2}{16 \times 10 {}^{ - 1} \times {10}^{ - 19} } \\ \\ \tt \longmapsto \: \frac{2}{16 \times 10 {}^{ - 1 +( - 19)} } \\ \\ \tt \longmapsto \: \frac{2}{16 \times {10}^{ - 1 - 19} } \\ \\ \tt \longmapsto \: \frac{ \cancel{2}}{ \cancel{16} \times {10}^{ - 20} } \\ \\ \tt \longmapsto \: \frac{1}{8 \times 10 {}^{ - 20} } \\ \\ \tt \longmapsto \: 8 \times 10 {}^{ - ( - 20)} \\ \\ \tt \longmapsto \: 8 \times {10}^{20} \\ \\ \tt \longmapsto \: 0.8 \times {10}^{21}$