Question

the energy per unit area associated with a progressive sound wave will be doubled if

Answer 1

To double energy per unit area , A should be doubled.

Explanation:

Total Energy   =  1 /2 m ω ^2 A^ 2

A r e a  = α A  ( λ  / 2 )

A r e a  =  K A  λ / 2      (Constant)

Energy per unit area   =  1 /2 m ω ^2 A^ 2 ÷ KA  λ / 2      

Energy per unit area  = α A

So, to double energy per unit area , A should be doubled.

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