Abstract
We will claim the velocity of the particles making up the CMB must be given by v_{cmb}=sqrt{k_bT_cmb/m_g}=c, where $k_b$ is the Boltzmann constant and T_cmb is the CMB temperature. This we will see leads to several interesting results such as the Hubble energy law: E_c=Nm_gv_cmb^2=Nm_gc^2=Nk_bT_cmb=T_p^3/T_0^2k_b/64 \pi^2. The findings here are fully consistent with the recent geometric mean approach of finding the CMB temperature by Haug and Tatum and also other related work we will refer to. }