Voices of swimmers at a pool travel 400 m/s through the air and 1,600 m/s underwater. the wavelength changes from 2 m in the air to 8 m underwater. how has the change in media affected the frequency of the wave?

The change in media affected the frequency by a quarter.

The sound velocity (), in meters per second, is described by the following expression:

(1)

Where:

- Wavelength, in meters. - Frequency, in hertz.

By (1), we get expression for the frequency:

Now we proceed to determine the frequency associated to each medium:

Water (, )

Air (, )

The change in media affected the frequency by a quarter.

We kindly invite to check this question on wavelengths: link

Neptune is the eighth planet from the sun. it was the first planet to get its existence predicted by  mathematical calculations  before it was actually seen through a telescope on sept. 23, 1846. irregularities in the orbit of  uranus  led french astronomer alexis bouvard to suggest that the gravitational pull from another celestial body might be responsible. german astronomer johann galle then relied on subsequent calculations to   spot neptune via telescope. previously, astronomer galileo galilei sketched the planet, but he mistook it for a star due to its slow motion. in accordance with all the other planets seen in the sky, this new world was given a name from greek and roman mythology — neptune, the roman god of the sea.