Recent content by nahira

To whom may be coming here via a Search Engine: I finally used these two equations from Ref1: V_Longitudinal=\sqrt{\frac{3K+4G}{3\rho}} V_Transverse=\sqrt{\frac{G}{\rho}} \rho: Density K: Bulk modulus G: Shear modulus (In fact, some manipulations are made to obtain the above...

Thanks for the excellent tip my brother, I would certainly consider searching for the Young's Modulus temperature dependence.

Good Point. I will search for the temperature dependence of bulk modulus, hope to find something. Thank you, but what about bulk modulus? Below 1% change in 100K to 500K is acceptable for me but 10% is not. are you sure that the variation of sound velocity, for all common solids, is under 1%...

Hi friends, I need the average speed of sound in some common solids, such as Si, Cu and Al, over temperature ranges from 100K to 500K. After 5 hours of surveying acoustic and physical properties handbooks and googling the web, what I find is almost nothing. Does anybody know a...

Thanks to you my brother. I've got the point. :smile:

Let me clarify what I meant, Suppose that I have a purely sinusoidal traveling transverse wave. I want to know can I assign a quasi-particle to it? If yes, the associated wave of this quasi-particle isn't transverse? ZapperZ, you are right. normal modes are stationary. but my original...

Hi my expert friends, I'm confused with these seemingly two contradictory statements: 1- Phonons are the quantized quasi-particles of the normal modes of lattice vibrations and we have Longitudinal (LA) and Transverse Acoustical (TA) Phonons and Longitudinal (LO) and Transverse Optical...