Start Free Mock LoginAlready registered? Login here

Physics - Sound Wave Question with Solution | TestHub

PhysicsSound WaveWavesMedium2 minQB

PhysicsMediummultiple choice

Plane harmonic waves of frequency 500 Hz are produced in air with displacement amplitude of 10 micron. Given that the density of air is 1.29 kg/m³ and the speed of sound in air is 340 m/s:

Options:(select one or more)

Answer:

A, B, C

Solution:

Pressure amplitude = $ρ v ω A = 1.29 \times 340 \times 2 π \times 500 \times 1 0^{- 5} \approx 13.8$ N/m². Energy density = $\frac{1}{2} ρ ω^{2} A^{2} \approx 6.4 \times 1 0^{- 4}$ J/m³. Flux = energy density $\times v \approx 0.22$ W/m².

Stream:JEESubject:PhysicsTopic:Sound WaveSubtopic:Waves

⏱ 2mℹ️ Source: QB

Doubts & Discussion

Loading discussions...