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The formula vw=f⋅λ

describes the relationship between the speed of a wave (vw
), and its frequency (f
) and wavelength (λ
).

For example, if a wave has a frequency of 120 Hz and a wavelength of 5m, it would have a speed of 600 m/s.

In one or two sentences, describe what would happen to the frequency of this wave if the wavelength is increased to 10m but the speed stays the same at 600 m/s.

If the wavelength is increased to 10m while the speed stays the same at 600 m/s, the frequency of the wave would decrease.

A student. Experiment by weighing a bell in the air and in a pool and measuring the time it takes for a friend to hear the bell. In one or two sentences, make and justify a hypothesis on which medium the friend would hear the bell the fastest

The friend would hear the bell fastest in the air, as sound travels faster through air compared to water due to the differences in density and compressibility of the two mediums.