I have a question on finding elasticity of colloids.(adsbygoogle = window.adsbygoogle || []).push({});

I am using Ultrasonics testing on testing the different elasticity of gelatine with different concentrations of additives, ie, salt, sugar.

From the ultrasonics data, I calculated the attenuation coefficient and the velocity (speed of sound) of the gelatine.

there is an equation related to the modulus of elasticity:

V= sqrt (C/P)

where V is the speed of sound, C is the elastic constant and p is the density.

however, I dont know the denisty of the sample I tested. So, is there other ways to calcuate the density with the attenuation coef and velocity? or is there another formula that can solve my problem?

Please help....:(

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# Homework Help: Elasticity in colloids (gels, jellies)

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