An electron is traveling at 0.85c. What is its mass? (The rest mass is 9.11 × 10-31 kg.)

A)

1.4 × 10-29 kg
B)

7.2 × 10-30 kg
C)

1.7 × 10-30 kg
D)

2.4 × 10-30 kg
E)

4.2 × 10-30 kg


C

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