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
Answer:C
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