pls solve

Asked by  | 9th Jun, 2009, 02:05: PM

Expert Answer:

n12 = v1 / v2

n21 = v2 / v1

n12 x n21 = v1 x v2 / v2 x v1 = 1

n12 = 1 / n21

Answered by  | 9th Jun, 2009, 04:34: PM

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