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A 10.5-kg object oscillates at the end of a vertical spring that has a spring constant...

A 10.5-kg object oscillates at the end of a vertical spring that has a spring constant of 1.70 ? 104 N/m. The effect of air resistance is represented by the damping coefficient

b = 3.00 N · s/m.

(a) Calculate the frequency of the damped oscillation.
Hz

(b) By what percentage does the amplitude of the oscillation decrease in each cycle?
%

(c) Find the time interval that elapses while the energy of the system drops to 4.00% of its initial value.
s

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