## Question

###### Review Problem. Through what potential difference would an electron need to be accelerated for it to achieve a speed of $40.0 \%$ of the speed of light, starting from rest? The speed of light is $c=3.00 \times 10^{8} \mathrm{~m} / \mathrm{s}$ review Section $7.7 .$

Review Problem. Through what potential difference would an electron need to be accelerated for it to achieve a speed of $40.0 \%$ of the speed of light, starting from rest? The speed of light is $c=3.00 \times 10^{8} \mathrm{~m} / \mathrm{s}$ review Section $7.7 .$

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