The amount of energy needed to create a tauon–antitauon pair is 3,560 MeV. An electron has a rest mass of . How many times more massive is a tauon than an electron? Give your answer to 3 significant figures.
If a metal sphere has a rest mass energy of J, what is its rest mass? Give your answer to 2 significant figures.
A proton has a rest mass of kg. What is the rest mass energy of a proton? Give your answer to 3 significant figures.