11. The larger the shear modulus , the greater the ability for a material to resist sharing forces. 12. The speed of shear waves is determined only by the solid material's shear modulus and density. 13. Where c _ s is speed of sound, \ rho is density and G is shear modulus . 14. If a material contains highly directional bonds, the shear modulus will increase and give a low Poisson ratio. 15. Several models exist that attempt to predict the shear modulus of metals ( and possibly that of alloys ). 16. Correlations between the melting temperature, vacancy formation energy, and the shear modulus have been observed in many metals. 17. In particular, Nano-scale properties such as elastic modulus, shear modulus and Poisson ratio can be measured. 18. The speed of a compression sound wave in solids is determined by the medium's compressibility, shear modulus and density. 19. Solid lipid bilayers also have a shear modulus , but like any liquid, the shear modulus is zero for fluid bilayers. 20. Solid lipid bilayers also have a shear modulus, but like any liquid, the shear modulus is zero for fluid bilayers.