Which of the following are true statements ? a) Thebiological effects of radiati

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Which of the following are true statements ? a) Thebiological effects of radiation per rad or gray differ with thekind of radiation that is absorbed. b) Whencalculating the effective dose of radiation in units of rems, thequality factor for alpha particles is much smaller than that forbeta and gamma radiation. c) Humans are constantlyexposed to background radiation from both natural and artificialsources. It is estimated that most people are exposed to an amountof background radiation well above the federal government'sstandard of 500 millirems (mrem) per year. d) About82 percent of background radiation comes from natural sources,while the remaining 18 percent coming from artificial sources. e) Only about 1 percent of our total exposure toradiation comes from sources such as testing nuclear explosives inthe atmosphere, nuclear weapons manufacture, nuclear power plantsand their wastes, and nuclear fuel processing. e) Only about 1 percent of our total exposure toradiation comes from sources such as testing nuclear explosives inthe atmosphere, nuclear weapons manufacture, nuclear power plantsand their wastes, and nuclear fuel processing.

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