Question

How close would two stationary electrons have to be positioned so that their total mass is 2 times what it is when the electrons are very far apart? Number Units A

Answer 1

The total energy T = Ut te ---- uz potential energy Eos los detine energie Us electrostatit per at rta u.=0 Tate again {e=e.me [mass energy] when they are replace near to each other their mas become a times the mass when they were placed apart. let the distane ber i electrostatic potential will be ega ba ( energy) UNG Y simelarity Eq= 2(2m) c = ume" (rew mass) 2. Total energy T2 = 1 aro amer from conservation of energy amen = 1 n ay tumer bo v = - 2 mer uno zmer

Here az electronic charge = 1.681019 ma electronic mass = 90x10 3 kg in = 9x109 putting this value o 9x108x(1.6810-19 2 x (99°1x10*31 ) x (3x108)" y = r=1.406x10 m . The ar -15 distance will be 1406x10 11406 fm