Experimental Values Of Ultrasonic Velocity Research Articles

Theoretical evaluation of ultrasonic velocity in binary liquid mixtures

Theoretical values of ultrasonic velocity in binary liquid mixtures of propan-1-ol and butan-1-ol with n-hexane, benzene and acetone have been evaluated using Free Length Theory, Collision Factor Theory and Nomoto's relation. Theoretical values are compared with experimental values and the chi-square test for goodness of fit is applied to check the validity of the theories. The theoretical values are in better agreement with experimental values of ultrasonic velocity for alcohols + acetone mixtures compared with alcohols + n-hexane and alcohols + benzene mixtures. The results are discussed in terms of self association in the alcohols.

Some Invariance Relations for Acoustic Waves in Crystals Deformed by Hydrostatic Pressure

Third order elastic coefficients can be determined by using experimental values of ultrasonic velocities and their changes by hydrostatic pressure. These elastic coefficients are correct only in the case when the experimental data satisfy some invariance relations. Propagation and polarization directions of crystals of Laue groups CI, CII, TI and HI fulfilling mentioned relations are given. [Russian Text Ignored.]