The speed of sound in air is dependent upon the air temperature and other factors. The speed of sound increases from 334 m/s to 341 m/s between 8:00am and 11:00am. If a horn produces sound with wavelength 0.75 m at 8:00am, what would it produce at 11:00am, assuming the frequency is unchanged?
A) 73 cm
B) 77 cm
C) Not enough info given to solve.
D) 75 cm

Question

Quizplus · Accepted Answer

The speed of sound increases, but the frequency remains constant. Using the formula v = fλ, where v is speed, f is frequency, and λ is wavelength, the new wavelength can be calculated as (341 m/s) / (334 m/s) * 0.75 m = 0.767 m or 77 cm.

The Speed of Sound in Air Is Dependent Upon the Air