At what speed must an object be moving in order that it has a ...

[kodithompson]

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

[wergv]

Answer to Question 1

D

Answer to Question 2

B

[kodithompson]

Gracias!

[pangili4]

TYSM