Effective mass (solid-state physics) from both sides gives where is the th element of , is the th element of , and are the th and th elements of , respectively, and is the total energy of the particle according to the Planck–Einstein relation. The index is contracted by the use of Einstein notation (there is an implicit summation over ). Since Newton's second law uses the inertial mass (not the gravitational mass), we can identify the inverse of this mass in the equation above as the tensor This tensor expresses the change in group velocity due to a change in crystal momentum. Its
Mercy Multiplied an audio bible featuring the voices of Christian celebrities and testimonies of Mercy Multiplied graduates. In spite of Mercy Multiplied principles of not accepting government funding and providing their program free of charge to their clients, Mercy Ministries Australia was investigated by the Australian Competition & Consumer Commission (ACCC) and found to be in breach of the Trade Practices Act 1997 and guilty of "false and misleading advertising" of their services, including advertising that their program was free of charge when their clients were in fact required to sign over their government welfare benefits. The former directors were required to