A sound wave in helium has an intensity of 1.00 × 10⁻³ W/m². The density of helium is 0.179 kg/m³ and the speed of sound in helium is 965 m/s. The pressure amplitude of the sound wave is A) 0.682 N/m². B) 0.588 N/m². C) 0.476 N/m². D) 0.345 N/m². E) 0.276 N/m².

Question

Quizplus · Accepted Answer

The pressure amplitude of a sound wave can be found using the formula:
Pressure amplitude = square root(intensity * density * velocity of sound)
Plugging in the given values, we get:
Pressure amplitude = square root(1.00 × 10^-3 * 0.179 * 965) = 0.588 N/m
Therefore, the correct answer is choice B.

A Sound Wave in Helium Has an Intensity of 1