Exam-style question
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Which statement best explains the relationship between mass and energy in relativistic contexts?.
- A.Mass can be converted into energy but not vice versa.
- B.Energy can be converted into mass but not vice versa.
- C.Mass and energy are equivalent and can be converted into each other.
- D.Mass and energy are unrelated.
Model answer
What a good answer should say
- Mass and energy are equivalent and can be converted into each other.
Explanation
Why this works
Formula: E = m c². Substitution: m is variable.
Working: Shows direct proportionality between mass and energy. Answer: Mass and energy are equivalent and can be converted into each other.
Units: J.
Common mistake
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