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Hospitals use ionising radiation for many purposes - Edexcel - GCSE Physics - Question 6 - 2015 - Paper 1
Question 6
Hospitals use ionising radiation for many purposes. (a) State one use of ionising radiation in a hospital. (b) An isotope of technicium, technicium-99, has a half-... show full transcript
Worked Solution & Example Answer:Hospitals use ionising radiation for many purposes - Edexcel - GCSE Physics - Question 6 - 2015 - Paper 1
Step 1
Step 2
Calculate how much technicium-99 will be in this sample after 12 hours.
Answer
To find the remaining amount of technicium-99 after 12 hours:
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The half-life of technicium-99 is 6 hours.
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After 12 hours, which is 2 half-lives, we can calculate the remaining amount as follows:
Initial amount = 40 mg After 1 half-life (6 hours): Amount remaining = (\frac{40}{2} = 20) mg After 2 half-lives (12 hours): Amount remaining = (\frac{20}{2} = 10) mg
Thus, the amount remaining after 12 hours is 10 mg.
Step 3
Explain why it is important to monitor the amount of radiation a radiographer absorbs each month.
Answer
Monitoring the radiation absorbed by a radiographer each month is crucial to ensure their safety and health.
- It helps to prevent excessive exposure, which can lead to harmful effects such as cancer or blood disorders.
- Regular monitoring allows for early detection of any potentially harmful levels of radiation exposure, ensuring interventions can be made to mitigate risks.
Step 4