Question

Determine o valor da energia de repouso de um eletron
dados: (Me= 9,10X10-³¹ kg , C= 3,0X10*8 m/s)

Answer 1

Me= 9,10.10^-31 kg= m₀
C= 3,0.10^8 m/s
E₀=energia de repouso=?

E₀=m₀.C²
E₀=(9,10.10^-31 kg).(3,0.10^8 m/s)²
E₀=(9,10.10^-31 kg).(9,0.10^16 m²/s²)
E₀=81,9.10^-15 kg.m²/s²
E₀=8,19.10^-14 J
1 eV=1,602.10^-19 J
E₀=8,19.10^-14/1,602.10^-19 eV
E₀=5,11.10^5 eV
1 MeV= 10^6 eV
E₀=0,511 MeV