answer the question below

Question

For a frequency of 880Hz with an amplitude of 7 ×10⁻⁴ m and 9 ×10⁻⁴ m in air calculate the intensity. The density of air at 20°C is 1.2 kg/m³ and the speed of propagation in the air is 343m/s.

Answer 1

intensity of sound is given as

I= 2∏² f² A²ρ V ,( Unit W/m² )

f= Frequency =880Hz

A = Amplitude =7 ×10⁻⁴ m and 9 ×10⁻⁴ = A _average= 8 x10-4

ρ= Density of air =1.2 kg/m³

V= speed of Propagation =343m/s. ( at 20⁰ C )

Plug in all the values to get I