A certain particle of mass m has a momentum of 0.9mc. (For the following questions, leave all your answers in terms of m and/or c.) a) What is the particle’s speed? (Careful here….the answer is not 0.9c) b) What is the particle’s Lorentz factor? (The Lorentz factor is the name of the quantity ?) c) What is the particle’s kinetic energy? d) What is the particle’s rest energy? e) What is the particle’s total energy?