The Rest Energy of an Electron Is 0

question 14

Multiple Choice

The rest energy of an electron is 0.511 MeV,and its rest mass is 0.511 MeV/c². If an electron has a speed of 99% that of light,what fraction of its total energy is in the form of kinetic energy?

• A)76%
• B)50%
• C)68%
• D)86%

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Definitions:

Positive Parenting

A parenting approach centered on understanding, support, and encouragement, focusing on positive reinforcement rather than punishment.

Authoritarian

Relating to a style of governance or leadership that emphasizes strict obedience to authority at the expense of personal freedom, or a personality type that favors such an approach.

Nativist Position

The perspective in cognitive development that emphasizes the role of genetic inheritance and biology in learning and behavior, often opposing the notion that understanding comes solely from experience or environment.

Phonological Awareness

The ability to recognize and manipulate sounds in words, a critical skill for the development of reading.