A sound wave in air has a speed of 340 m/s. If this sound wave is known to have a wavelength of 20 meters, what is its frequency?

Question

ash2326 · Answer

wavelength=20 meters
speed= 340m/s
frequency=speed/wavelength=340/20=17 Hz

anonymous · Answer

thanks what formula dis you use?

ash2326 · Answer

frequency= speed/ wavelength

anonymous · Answer

Arrange the following sound waves according to speed from the slowest to the fastest: The sound waves in steel, the sound waves in cold air, the sound waves in water, and the sound waves in hot air.

anonymous · Answer

$$\lambda = {v \over f}$$This is the formula ash is using.

anonymous · Answer

Regarding your second question. Sound waves travel faster through denser mediums.