conservation of mass and energy

• m=m(subscript)0, which is a particles rest mass

• law of conservation of mass-energy: the sum of all mass and energy in the universe is a constant

• when mass converts to energy, the change in energy is related to the change in rest mass, in (delta) E = (delta) m(subscript)0 c²

• c = velocity of light: 3.00 × 10^8 m/s

The quantum mechanical atom: chapter 7

• In an electromagnetic wave, the amplitude is the intensity or the brightness.

• frequency of waves is hertz

• the energy of a photon is proportional to the radiation’s frequency. E = hv

• h is plancks constant

• KE(kinetic energy) = hv - BE (minimum energy needed to eject the electron from the metal’s surface)