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

Question

Quizplus · Accepted Answer

This statement is not true. Antimatter has been observed and studied in experiments, but it is still challenging to produce and store in sufficient quantities for use in engines.

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