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Chris Spencer edited introduction.tex
almost 10 years ago
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\section{Introduction}
Acoustics can be used to further investigate properties of material. For example the acoustics of sending sound waves in a cyldrical and rectangular geometry can be used to see if and how the speed of sound changes in air. In the same way, the propterites of a liquid can investigated using acoustics. In quantum fluids, apparent attenuation and dispersion of sound occurs. Helium 3 at low temperatures and using high frequencis of sound shows a collective excitation known as serio sound.Helium 4 is a bose liquid and shows these superfluid properties, which supports wave motions we can measure. In this experiment we want to investage sound modes in a superfluid helium 4 liquid called 1st,2nd, and 4th sound.
