Question 1016077
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{{{T=2(pi) sqrt(L/g)}}}
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{{{T/(2(pi))=sqrt(L/g)}}}
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{{{(T^2/(2(pi))^2)}}}=({{{L/g}}}
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{{{gT^2/4(pi^2)}}}=L
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L={{{gT^2/4pi^2}}}