Author Question: During the annihilation of matter and antimatter, what percentage of the mass of the colliding ... (Read 91 times)

penguins · **on:** Jul 27, 2018

During the annihilation of matter and antimatter, what percentage of the mass of the colliding particles is converted into energy?

A) 0.7
B) 0.07
C) 70
D) 100

Question 2

A set of twins, Andrea and Courtney, are initially 10 years old. While Courtney remains on Earth,

Andrea rides on a space ship which travels away from Earth at a speed of 0.6c for five years (as measured by Courtney), then turns around and comes back at 0.6c. When Andrea returns, Courtney is 20 years old. How old is Andrea upon her return?
A) 10 years
B) 12 years
C) 15 years
D) 18 years
E) 20 years

jgranad15 · **Reply #1 on:** Jul 27, 2018

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Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.

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