Calculate the energy in MeV equivalent to the rest mass of an electron . Given that the rest mass of an electron , `m=9.1 xx 10^(-31) kg`, `1MeV = 1.6 xx 10^(-13) J` and speed of light , `c= 3 xx 10 ^(8) ms ^(-1)`.

What is the number of electrons that would weight 1 kg? Mass of an electron is 9.11 xx 10^-31 kg .

Calculate the change in mass of an object if 800 electrons are given to it Given: Mass of an electron is 9.1xx10^(-31) kg .

The rest mass of an electron is 9.11xx10^(-31) kg. Molar mass of the electron is

Calculate the de Broglie wavelength of an electron moving with a velocity of 0.3c. Rest mass of an electron is 9.1xx10^(-31)kg.

The rest mass of an electron is 9.1 xx10^(-31) kg. Its kinetic energy when it moves with a speed of 2.4xx10^(8) m/s is

A neutron breaks into a proton and electron. Calculate the energy produced in this reaction in MeV. Mass of an electron =9xx10^(-11) kg. mass of proton=1.6725xx 10^(-27) kg, Mass of neutron=1.6747 xx10^(-27) kg. speed of light = 3xx10^(8)m//sec .

Calculate the equivalent energy of electrons and proton at rest. Given that mass of electron =9.1xx10^(-31)kg and mass of proton =1.673xx10^(-27)kg .