Radioactivity: What is the order of magnitude of the age of a 40-year-old person in seconds?
Q: The number of radioactive nuclei present at the start of an experiment is 3.52 x 1015. The number…
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Q: A film badge worn by a radiologist indicates that she has received an absorbed dose of 3.3 x 10-7…
A: 1 Gy of absorbed radiation means = 1Jole of energy absorbed per 1 Kg OR 100 erg of energy per…
Q: A Geiger counter registers a count rate of 8,000 counts per minute from a sample of a radioisotope.…
A: Activity A=A0e-0.693tT12AA0=e-0.693tT12lnAA0=-0.693tT12T12=-0.693tlnAA0 =-0.69324 minln1000…
Q: A Geiger- Mueller counter registers an initial reading of 3200 counts while measuring a radioactive…
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Q: An unknown radioactive element decays into non-radioactive substances. In 360 days the radioactivity…
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Q: ing on a Geiger counter at 155 cm from a radiation source was 7.620 x 10^3 counts per minute (cpm).…
A: Given:- The distance of the Geiger counter from radiation sourced = 155 cm The reading of the…
Q: A thyroid cancer patient is given a dosage of 131I (half-life = 8.1 d). What fraction of the dosage…
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Q: 15. An 85 kg person was exposed to a gamma source and received a whole body dose of 0.5 Sv. How much…
A: The dose equivalent is given by
Q: unknown radioactive element decays into non-radioactive substances. In 480 days the radioactivity of…
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Q: Manganese-52 has a half-life of 6 days. How many days would a scientist have to wait for the…
A: The radioactivity decay of a sample has a relationship given by:Nt=N0e-λt………(1)where,N0 is the total…
Q: A Geiger counter registerss a count rate of 6,800 counts per minute from a sample of a radioisotope.…
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Q: We use a Geiger counter to measure RT, the total counting rate (in counts per minute) due to a…
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Q: During a 2-h period of radiation therapy, alpha radiation is deposited into a patient's body at a…
A: time period (T) = 2 hr rate of deposition = 3.3×10-8 Jsmass of patient (m) = 59 kg radiation type :…
Q: A Geiger counter reading of a radioactive sample is initially 7020 counts per minute. The same…
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- Radioactive Decay Curve for Arsenic-79 100 75 50 25 24 30 42 Time (min) Based on the above graph, what is the time required for the sample of arsenic-79 to experience its 2nd and 3rd half-lives respectively? (%) 6L-OuoayPzunowyA Geiger counter reading of a radioactive sample is initially 7220 counts per minute. The same sample gives a reading of 422 counts per minute 10.6 h later. What is the sample's half-life?A Geiger counter reading of a radioactive sample is initially 6520 counts per minute. The same sample gives a reading of 422 counts per minute 10.1 h later. What is the sample's half-life?
- A radioactive sample has a half-life of 28 mins. If the initial amount of sample was 2 g, estimate how much will be left after 40 mins,A Geiger counter reading of a radioactive sample is initially 6520 counts per minute. The same sample gives a reading of 402 counts per minute 10.9 h later. What is the sample's half-life?A building has become accidentally contaminated with radioactivity. The longest-lived material in the building is strontium-90. (The atomic mass of 90/38 Sr is 89.9077 u.) If the building initially contained 8.6 kg of this substance and the safe level is less than 10.4 counts/min, how long will the building be unsafe? Provide answer in number of years.
- 4. 500 mCi sample of radioisotope was purchased by a medical supply house. If the sample has the half-life of 15 days. How long will it keep before it's activity is reduced to 25 mCi ?asapA Geiger counter reading of a radioactive sample is initially 7420 counts per minute. The same sample gives a reading of 422 counts per minute 11.0 h later. What is the sample's half-life?
- The radioactive glucose used in PET scans has a half-life of approximately 2 hours. How much of the original radioisotope remains 8 hours after being injected in a patient?✓ ON "O 2.75 MeV 0.511 MeV 0.511 MeV B, E= 1.73 MeV Eave = 0.721 Mev O MeVA sample of radioactive material has a half-life of 12 hours. If the initial sample contained 6.2x10¹3 radioactive nuclides estimate the number of radioactive nuclides present in the sample after 5 hours.