Which of the Following Statements About Matter- Antimatter Engines Is

question 82

Multiple Choice

Which of the following statements about matter- antimatter engines is not true?

• A)Spacecraft powered by matter- antimatter engines could probably reach speeds of more than half the speed of light.
• B)One of the major challenges to developing matter- antimatter engines is finding a way to store antimatter after it is produced.
• C)Matter- antimatter reactions represent the most efficient possible reactions in terms of energy release.
• D)Matter- antimatter engines would be great in theory, but to date we have no evidence that antimatter even exists.

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Definitions:

Conditioned

Describes a response that has been learned through the process of conditioning, where a neutral stimulus becomes associated with a meaningful stimulus, eliciting a learned response.

Learning

The process of acquiring new understanding, knowledge, behaviors, skills, values, attitudes, and preferences.

Conditioned Stimulus

A previously neutral stimulus that, after becoming associated with an unconditioned stimulus, eventually comes to trigger a conditioned response.

Unconditioned Stimulus

A stimulus that naturally triggers a response without any prior learning or association.