Which one of the following statements is not correct?

(a) Sound waves in gases are longitudinal in nature
(b) Sound waves having frequency below 20Hz are known as ultrasonic waves
(c) Sound waves having higher amplitudes are louder
(d) Sound waves with high audible frequencies are sharp

Anurag Mishra Professor Asked on 15th February 2016 in Physics.
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    Answer: (a) Sound waves in gases are longitudinal in nature

    Anurag Mishra Professor Answered on 16th February 2016.
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