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The Velocity of an Electron Is Changed from C/2 in the -X

Question 17

Multiple Choice

The velocity of an electron is changed from c/2 in the -x direction to c/2 in the +x direction.As a result, its kinetic energy changes by:

A) 2mc²
B) √2mc²
C) mc²
D) 0.5mc²
E) 0

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