alleryHow many degrees of freedom has a molecule moving in space?
AThree
BNine
CSeven
DTwelve
Answer & Solution
Correct answer: A. Three
1. Motion along a line is one, in a plane is two.
2. Space adds one more independent direction.
3. There is one degree of freedom for motion in a line, two in a plane and three in space.
4. So the answer is three.
_Source: syllabus Physics Part II, Ch 12 'Kinetic Theory'_
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