An Electron of Mass 9

question 71

Multiple Choice

An electron of mass 9.11 × 10−³¹ kg moves with a speed of 0.630c.What is its total energy? (c = 3.00 × 10⁸ m/s)

• A)6.37E-14 J
• B)2.36E-14 J
• C)1.63E-14 J
• D)1.06E-13 J
• E)​1.01E-13 J

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