Calculate the Displacement Amplitude (In M) of a 20 KHz

question 51

Multiple Choice

Calculate the displacement amplitude (in m) of a 20 kHz sound wave in helium if it has a pressure amplitude of 8.0 × 10−³ N/m². (ρ = 0.179 kg/m³, v = 972 m/s.)

• A) 2.9 × 10−¹⁰
• B) 3.7 × 10−¹⁰
• C) 7.8 × 10−⁹
• D) 2.4 × 10−⁹
• E) 1.9 × 10−¹⁰