Ahelium atom consists of two protons and two neutrons and has an energy of 28.3 mev. if these were to be separated into two deuterons (each consisting of a single proton and a single neutron and having an energy of 2.225 mev), how much "extra mass" (in kilograms) does the helium atom have when compared to the two deuterons? how much energy in joules would be release by breaking apart a helium into two deuterons?

Light from two different sources are incident upon the same side of a polarizing filter. light from one source is polarized with total intensity ip, while light from the other source is unpolarized with total intensity iu. as you rotate the polarizing filter through 360 degrees, the intensity of the transmitted light on the other side varies by a factor of 9. what is the relative intensity of the initial polarized source to the unpolarized source, or ip/iu?