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18-10-2016
Physics

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What is the speed of an electron that has been accelerated from rest through a potential difference of 1020 V?

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Аноним Аноним

30-10-2016

a. KE in electron volts is 1020 eV.
b. KE in Joules is e(1020) = (1.6022E-19)(1020) = 1.634E-16
c. KE = (1/2)mv^2, so v = sqrt[2*KE/m] = 18.94E6 m/s

note: m is the mass of an electron = 9.109e-31 kg

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