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Sound waves travel at 380 \mathrm{~m} / \mathrm{s} through a warm air and at 3800 \mathrm{~m} / \mathrm{s} through brass: The wace length of a 760 \mathrm{~Hz} acoustic wave as it enters horas from warm air

Option: 1

decrease by a factor 10


Option: 2

Increase by a factor 20


Option: 3

Increase by factor 10


Option: 4

decrease by a factor 20


Answers (1)

best_answer

V =n \lambda \\

V\alpha \lambda \\

\frac{v_1}{v_2} =\frac{\lambda_1}{\lambda_2} \\

\frac{380}{3800} =\frac{\lambda 1}{\lambda_2} \\

\frac{\lambda_1}{\lambda_2} =\frac{1}{10} \\

\lambda_2 =10 \lambda_1

Increase by a factor 10

Posted by

Riya

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