Sound attenuation is inversely proportional to this power of the speed of sound according to Stokes Law. The Dulong-Petit Law says the molar heat capacity of most substances is this number times R. The potential of this many dipoles interacting through London dispersion forces is given by an expression named for Axilrod and Teller. For a molecule, the total number of degrees of freedom is equal to this number times the number of atoms. In the Standard Model, this is the number of mixing angles in the (*) CKM matrix, which corresponds to the fact that there are this many generations of quarks. 
Sound attenuation is inversely proportional to this power of the speed of sound according to Stokes Law. The Dulong-Petit Law says the molar heat capacity of most substances is this number times R. The potential of this many dipoles interacting through London dispersion forces is given by an expression named for Axilrod and Teller. For a molecule, the total number of degrees of freedom is equal to this number times the number of atoms. In the Standard Model, this is the number of mixing angles in the (*) CKM matrix, which corresponds to the fact that there are this many generations of quarks. The dropoff of the electric field of a dipole occurs as this power of the distance. For 10 points, name this integer equal to the number of quarks that comprise a baryon.
Sound attenuation is inversely proportional to this power of the speed of sound according to Stokes Law.