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## Homework Statement

A cord vibrates with a frequency of 3.0 Hz when a mass of 0.60kg is hung up from it. What is its frequency if only 0.38kg hangs from it?

## Homework Equations

f= 1/2pi sqrt k/m

## The Attempt at a Solution

3.0= 1/2pi sqrt ( k/0.6)

k=213.18 N/m

f= 1/2pi sqrt (213.18/ 0.38)

f= 37.2 Hz[/B]