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The correctness of equation can be check...

The correctness of equation can be checked using the principle of homogeneity in dimensions.Using this principle, check whether the equation `f=2pisqrt(l/g)` is dimensionally correct, where f - frequency, I - length and g - acceleration due to gravity.

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`[f]=[M^0L^0T^-1],[L]=[M^0LT^0],[g]=[M^0LT^-2]` since `[f]ne[sqrt(l/g)],` the equation is wrong.
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