Which of the following statements about matter-antimatter engines is not true?
A)Matter-antimatter reactions represent the most efficient reactions possible in terms of energy release.
B)Matter-antimatter engines would be great in theory,but to date we have no evidence that antimatter even exists.
C)One of the major challenges to developing matter-antimatter engines is finding a way to produce enough antimatter.
D)One of the major challenges to developing matter-antimatter engines is finding a way to store antimatter after it is produced.
E)Spacecraft powered by matter-antimatter engines could probably reach speeds of more than half the speed of light.

Question

Quizplus · Accepted Answer

To date, we have evidence for the existence of antimatter, as it has been produced and observed in particle accelerators. Matter-antimatter reactions are also theoretically possible, and the other statements are true.

Which of the Following Statements About Matter-Antimatter Engines Is Not