The SI unit of radiation dose is "gray" (Gy) which is radiation equivalent to 1 J/kg. A small energy delivered as ionizing radiation can create huge damage at the cellular level, and the sievert is a unit of the health effect of radiation proportional to the radiation dose, but multiplied by factors allowing for the absorption and the nature of the radiation. Which of these statements are true? You may need to research these answers, but they are useful to know. The background radiation flying in a commercial aircraft is about 10x the average natural background at the surface of Earth. A dose of 4 to 5 sieverts will kill a human with a 50% probability within 30 days if the dose is received over a short period (say accidental exposure). The dosage from a dental X-ray is about 1 milli-sievert.
Radioactive decay
The emission of energy to produce ionizing radiation is known as radioactive decay. Alpha, beta particles, and gamma rays are examples of ionizing radiation that could be released. Radioactive decay happens in radionuclides, which are imbalanced atoms. This periodic table's elements come in a variety of shapes and sizes. Several of these kinds are stable like nitrogen-14, hydrogen-2, and potassium-40, whereas others are not like uranium-238. In nature, one of the most stable phases of an element is usually the most prevalent. Every element, meanwhile, has an unstable state. Unstable variants are radioactive and release ionizing radiation. Certain elements, including uranium, have no stable forms and are constantly radioactive. Radionuclides are elements that release ionizing radiation.
Artificial Radioactivity
The radioactivity can be simply referred to as particle emission from nuclei due to the nuclear instability. There are different types of radiation such as alpha, beta and gamma radiation. Along with these there are different types of decay as well.
The SI unit of
Which of these statements are true? You may need to research these answers, but they are useful to know.
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The background radiation flying in a commercial aircraft is about 10x the average natural background at the surface of Earth. |
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A dose of 4 to 5 sieverts will kill a human with a 50% probability within 30 days if the dose is received over a short period (say accidental exposure). |
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The dosage from a dental X-ray is about 1 milli-sievert. |
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NASA astronauts are allowed to receive a dose of 1 sievert during their career. |
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The background 50 km from the site after a nuclear weapons detonation is about 1 sievert. |
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The natural background radiation is approximately 1 milli-sievert a year but varies with location on Earth. |
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