How are the wavelength and frequency of a sound related to its speed?

A light of wavelength 5800Å incident on a glass slab and undergoes refraction. Calculate the speed, wavelength and frequency of the refracted light (Refractive index of glass is 3//2 )

Define the wavelength of a sound wave. How is it related to the frequency and the wave speed? (AS_1)

A source producing sound of frequency 170 Hz is approaching a stationary observer with a velocity 17 ms^(-1) . The apparnet change in the wavelength of sound heard by the observer is (speed of sound in air =340 ms^(-1))

A train standing in a station-yard, blows a whistle of frequency 400Hz in still air. The wind starts blowing in the direction from the yard to the station with a speed of 10 ms^(-1) . What are the frequency wavelength and speed of sound for an observer standing on the station.s platform? Is the situation exactly identical the case when the air is still and the observer runs towards the yard at a speed of 10 ms^(-1) ? The speed of sound in still air can be taken as 340 ms^(-1)

Write the relation between wavelength, frequency and speed of sound (AS_1)