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Hina Qabeel Ghose
Asked: 2022-11-09T19:23:30+05:30 In:

A `40 cm` long brass rod is dropped one end first onto a hard floor but is caught before it topples over . With an `3 kHz` tone . The speed of sound in brass is
A. `600 m//s`
B. `1200 m//s`
C. `2400 m//s`
D. `4800 m//s`

A `40 cm` long brass rod is dropped one end first onto a hard floor but is caught before it topples over . With an `3 kHz` tone . The speed of sound in brass is
A. `600 m//s`
B. `1200 m//s`
C. `2400 m//s`
D. `4800 m//s`
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1 Answer

  1. Correct Answer – C
    The brass rod is open at both ends .
    So the longitudinal waves will have a fundamental frequency `f_(0) = (v)/( 2l)`.
    `v = (3000) (2) ((40)/(100))`
    `v = 2400 m//s`

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