An electron of mass 9.11 x 10^-31kg moves with a speed of 0.600 c.What is its kinetic energy? (c = 3.00 x 10⁸ m/s) A)2.05 x 10^-14 J B)3.90 x 10^-14 J C)4.74 x 10^-14 J D)6.22 x 10^-14 J

Question

Quizplus · Accepted Answer

The correct answer is A because the kinetic energy of an electron is given by the equation KE = (1/2)mv^2, where m is the mass of the electron and v is its speed. Plugging in the given values, we get KE = (1/2)(9.11 x 10^-31 kg)(0.600 c)^2 = 2.05 x 10^-14 J.

An Electron of Mass 9