1. Calculate the rest mass of the proton in units of MeV/c2
2. An electron has a total energy of 2.7 MeV. What is the relativistic momentum?
3. As observer on earth, a certain type of bacterium is known to double in number every 24 hrs. 2 cultures of these bacteria are prepared, each consisting initially of 1 bacterium. One culture is left on earth and the other is placed on a rocket that travels at a speed 0.866c relative to the earth. At a time when the earthbound culture has grown to 256 bacteria. How many bacteria are in the culture on the rocket according to an earth based observer?