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Physical World — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysicsPhysical World1 Mark
Question
How many electrons would weigh 1kg? [Given mass of one electron $= 9.11 \times 10^{-31} \text{kg}$
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Answer

Mass of 1 electron $= 9.11 \times 10^{-31} \text{kg}$ For, $\text{n}\times9.11\times10^{-31}=1\text{kg}$ $\therefore\text{n}=\frac{1}{9.11\times10^{-31}}\approx1.1\times10^{30}$

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