First slide

Introduction to waves

Question

When a sound wave of frequency 300 Hz passes through a medium the maximum displacement of a particle of the medium is 0.1 cm. The maximum velocity of the particle is equal to

Easy

A

60 $π$ cm/sec
B

30 $π$ cm/sec
C

30 cm/sec
D

60 cm/sec

Solution

$v_{\max} = aω = a \times 2 πn = 0 .1 \times 2 π \times 300 = 60 π cm / \sec$

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