Error propagation, is this correct?

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EastWindBreaks
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Homework Statement


given E is constant, find the uncertainty in the angular frequency, ω.
can someone please check my work?

Homework Equations

The Attempt at a Solution


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haruspex said:
I don't think your expression for σc in the third line is correct. You can check using dimensional analysis.
thank you, does this looks correct? σc = σb / (2sqrt(b))
I checked. it seems ok?
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