Reply #18: rems

[phusion]

Found this on google:

rem is a unit scientist use to measure radiation exposure. Over a persons lifetime, they usually receive 7-14 rems of natural sources of radiation, such as cosmic rays and ultraviolet rays from the sun. On a single exposure of 5-75 rems, there are few to no noticeable symptoms. For someone to receive 75-200 rems of exposure, vomiting, fatigue, and loss of appetite would occur. Recovery would take a few weeks. If someone were to be exposed to more than 300 rems, severe changes in blood cells and hemorrhage takes place. If someone were to receive more than 600 rems, symptoms would be hairloss, loss in your bodies ability to fight infection and usually results in death. (World Book vol. 16, 79)