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Author Question: At what speed must an object be moving in order that it has a kinetic energy 2.50 times its rest ... (Read 142 times)

kodithompson

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on: Jul 28, 2018
At what speed must an object be moving in order that it has a kinetic energy 2.50 times its rest energy? (c = 3.00  108 m/s)
 a. 2.52  108 m/s
  c. 2.75  108 m/s
  b. 1.91  108 m/s
  d. 2.87  108 m/s

Question 2

If the total energy of an electron in an accelerator is five times its rest energy, what is its speed? (c = 3.00  108 m/s)
 a. 1.98  108 m/s
  c. 2.32  108 m/s
  b. 2.94  108 m/s
  d. 2.90  108 m/s


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wergv

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Reply #1 on: Jul 28, 2018
Answer to Question 1

D

Answer to Question 2

B


kodithompson

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Reply 2 on: Jul 28, 2018
YES! Correct, THANKS for helping me on my review

xiaomengxian

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Reply 3 on: Yesterday
Wow, this really help

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