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Wael Hammad Questions
10601 Questions
Why is keeping one’s distance from a source of radiation effective in minimising exposure? Because
Medicine
2022-10-21
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What does the unit the sievert describe?
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2022-10-21
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Why are gamma rays are able to penetrate “solid” walls but alpha or beta rays cannot? Because
Medicine
2022-10-21
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Why is a shield made of lead effective in reducing the exposure to gamma rays? Because the
Medicine
2022-10-21
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Suppose a gamma source is placed 10 cm from a radiation detector and in succession, a 1 cm thick slab of each of the following materials is used to shield the source. For which one would the count rate be lowest?
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2022-10-21
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Which is the most penetrating nuclear radiation?
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2022-10-21
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Which one of the following radiations, all of 1 MeV energy, is the least penetrating?
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2022-10-21
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Which one of the following sources contributes to the background radiation?
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2022-10-21
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Which of the following does NOT contribute to the background radiation?
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2022-10-21
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What is a radionuclide with a short half-life (say 5 hours) said to be?
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2022-10-21
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A particular radionuclide has a half-life of six hours. When first measured, its activity is 10,000 Bq. Twelve hours later, what will its activity be?
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2022-10-21
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In an experiment to determine the half-life of a particular radionuclide, measurements of the mass of that nuclide are made. If masses of 8 micrograms and 2 micrograms are recorded at intervals 8 days apart, what is the half-life of the nuclide?
Medicine
2022-10-21
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‘Half-life’ when applied to atoms of a radioactive isotope refers to the:
Medicine
2022-10-21
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