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What is the correct answer?
4
The expansion ratio (r) is the ratio of (where v1 = Volume at the beginning of expansion, and v2 = Volume at the end of expansion)
A.
v
1
/v
2
B.
v
2
/v
1
C.
(v
1
+ v
2
)/v
1
D.
(v
1
+ v
2
)/v
2
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