What is the wavelength of a wave if it moves at 100 m/s and has a frequency of 33 Hz?

The average speed of sound is 343 m/s. If a pitch is heard at 500 Hz, what is the wavelength of that sound?

The average speed of sound is 343 m/s. If a wavelength of a certain sound is 1.3 m, what is the frequency of that sound?

a and c

c is 100% but i am confused in a

speed of light in vacuum is 300,000 km/s

speed of light in other mediums is given by the expression v = c/n, where c is the speed of light in vacuum and n is the refractive index of medium.

for the first medium v = 200,000 km/s

  so, refractive index of medium = 300000/200000 = 1.5

    1.5 refractive index is usually for glass. so first medium is glass.

for the second medium v = 250,00 km/s

so, refractive index of medium = 300000/250000 = 1.2

    1.2 refractive index is usually for water. so second medium is water.

for the third medium v = 0 km/s

so, refractive index of medium = 300000/0 = ∞

    ∞ refractive index is usually for opaque mediums. so third medium is opaque medium.