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90. (a) The graph shows part of a periodic pattern of halfcycle “length”
∆
n
= 0.4.
Thus
if we set
n
= 1.0 + 2
∆
n
= 1.8 then the maximum at
n
= 1.0 should repeat itself there.
(b) Continuing the reasoning of part (a), adding another halfcycle “length” we get
1.8
2.2
n
+∆ =
for the answer.
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 Spring '08
 Any
 Physics

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