Waves Sound>Wave Parameters Practice Test

In air at standard conditions, sound travels about 340 m/s. A tuning fork produces a steady tone of 850 Hz. Which of the following is closest to the value of the wavelength?

A small speaker emits sound uniformly in all directions with acoustic power 2.0 W. At a distance of 10 m from the speaker, which of the following is closest to the value of the intensity at 10 m?