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A mass m at the end of a spring vibrates with a frequency of 0.88 Hz...

A mass m at the end of a spring vibrates with a frequency of 0.88 Hz . When an additional 660 g mass is added to m, the frequency is 0.56 Hz .

What is the value of m?

Express your answer using two significant figures.

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Thank you Dear....best of luck for your exams

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