Question

What is the minimum total energy released when
an electron and its antiparticle (positron)
annihilate each other?

Answer 1

use mass of electron and plug it into E=mcsquared

Answer 2

ooh unless positron has a mass also then you have to use the mass of both.

Answer 3

E= (mass of electron + mass of positron) * c^2

Answer 4

See http://imagine.gsfc.nasa.gov/docs/ask_astro/answers/970719b.html

Answer 5

electron and positron have a rest mass of 0.511 Mev/c^2, so the energy produced during annihilation would be 0.511*2 =1.022 Mev