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A damped harmonic oscillator consists of a block of mass 3 kg and a spring with...

A damped harmonic oscillator consists of a block of mass 3 kg and a spring with spring constant k=7 N/m. Initially, the system oscillates with an amplitude of 23 cm. Because of the damping, the amplitude loses 60% of its initial value by the end of four oscillations.

a.) What is the value of the damping constant, b?
b =?

b.) What percentage of initial energy has been lost during these four oscillations?
%=?

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