Question

A 170 g oscillator in a vacuum chamber has a frequency of 1.5 Hz . When...

A 170 g oscillator in a vacuum chamber has a frequency of 1.5 Hz . When air is admitted, the oscillation decreases to 60% of its initial amplitude in 50 s.

How many oscillations will have been completed when the amplitude is 30% of its initial value?

Express your answer in oscillations.

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