A beam of nuclei is used for cancer therapy. Each nucleus has an energy of 108 MeV, and the relative biological effectiveness (RBE) of this type of radiation is 16. The beam is directed onto a 0.200-kg tumor, which receives a biologically equivalent dose of 218 rem. How many nuclei are in the beam? Number Units Multiple-Concept Example 1 uses an approach similar to that needed in this problem, except here the temperature remains constant while a phase change occurs. A sample of a liquid undergoes a phase change from liquid to gas because it is irradiated with a large dose of ionizing radiation. If the latent heat of vaporization of the liquid is 29.6 x 10" J/kg, what is the absorbed dose of the radiation in rads? Number Units