## anonymous 4 years ago 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?

1. ash2326

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

2. anonymous

thanks what formula dis you use?

3. ash2326

frequency= speed/ wavelength

4. anonymous

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.

5. anonymous

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

6. anonymous

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