An ion source is producing 6 Li ions, each of which has a charge e and a mass of 9.99 x 10-27 kg. After being accelerated by an electric potential difference of 644 kV, the ions pass into a region containing both uniform electric and magnetic fields. If the magnetic field has a magnitude of 0.199 T and is oriented vertically, what is the magnitude of the smallest electric field that would allow the ions to pass through the region undeflected

Which of the following is the result of the nuclear weak force? the instability of large nuclei the repelling force between positively charged protons the structure of the atom certain types of nuclear decay

The two stars in a certain binary star system move in circular orbits. the first star, alpha, has an orbital speed of 36 km/s. the second star, beta, has an orbital speed of 12 km/s. the orbital period is 137 d. a) what is the mass of the star alpha? b) what is the mass of the star beta?

The nuclear potential that binds protons and neutrons in the nucleus of an atom is often approximated by a square well. imagine a proton conned in an innite square well of length 105 nm, a typical nuclear diameter. calculate the wavelength and energy associated with the photon that is emitted when the proton undergoes a transition from the rst excited state (n 2) to the ground state (n 1). in what region of the electromagnetic spectrum does this wavelength belong?