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The amplitude of a damped oscillator decreases to 0.9 times its original magnitude is 5 s. In another 10 s it will decrease to alpha times its original magnitude, where alpha equals : |
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Answer» 0.81 `A=A_(0)e^(-kt)` `IMPLIES""0.9A_(0)=A_(0)e^(-5K)` and `""A_(0)=A_(0)e^(-15k)` solving `impliesalpha=0.739` So, CORRECT choice is (b). |
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