physics help please!!!?

S

Salman A

New member
a oscillator in a vacuum chamber has a frequency of 2hz. the oscillator's mass is 0.2kg air is admitted to the chamber when t=0s ; when t=5s, the amplitude is 60% of its undamped value after 50s. at what time is the amplitude 30% of its original value (ie. t what time t* is A(t*)=(.3)(Ao)?)
 
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