Question

A sound wave of frequency 440 Hz is passing through air. An `O_2` molecule (mass`=5.3xx10^(-26)Kg)` is set in oscillation with an amplitude of `10^-6m` speed at the centre of its oscillation is :
A. `1.70xx10^(-6) m//s`
B. `17.0xx10^(-6) m//s`
C. `2.76 xx10^(-3) m//s`
D. `2.77xx10^(-6) m//s`

Answer 1

Correct Answer - C
`v_(max)=omega_(0)A`
`=(2pif)A=(2pi)(440)(10^(-6))`
`=2.76xx10^(-3) m//sec`