A radioactive material initially is observed to have an activity of 900 decays/sec. If 10.0 hours...
A radioactive material initially is observed to have an activity of 900 decays/sec. If 10.0 hours later it is observed to have an activity of 100 decays/sec, what is its half-life?
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A radioactive material initially is observed to have an activity
of 900 decays/sec. If 10.0 hours...
36. A radioactive material initially is observed to have an activity of 1000 decays/sec. If three...
36. A radioactive material initially is observed to have an activity of 1000 decays/sec. If three hours later it is observed to have an activity of 125 decays/sec, what is its half-life? A. 1/2 hour B. 1 hour C. 3 hours
A sample of radioactive material is initially found to have an activity of 115 decays/min. After...
A sample of radioactive material is initially found to have an activity of 115 decays/min. After 4 d 22 h, its activity is measured to be 63 decays/min. 1) (a) Calculate the half-life of the material.
A radioactive sample has an initial activity of 400 decays/s. Its activity 22 hours later is...
A radioactive sample has an initial activity of 400 decays/s. Its activity 22 hours later is 25 decays/s. What is its half-life Can you show how you do this. thank you
A) A radioactive material produces 1220 decays per minute at one time, and 4.2 h later...
A) A radioactive material produces 1220 decays per minute at one time, and 4.2 h later produces 150 decays per minute. What is its half-life? B) What fraction of a sample of 6832Ge, whose half-life is about 9 months, will remain after 3.5 yr ? C) What is the activity of a sample of 146C that contains 7.0×1020 nuclei? The half-life of 146C is 5700 years.
A sample of radioactive material is initially found to have an activity of 114 Bq. After...
A sample of radioactive material is initially found to have an activity of 114 Bq. After 4 days and 5 hours, the activity of the sample is found to be 85 Bq. 1) Calculate the disintegration constant of this material. 1 = 51 Submit 2) Calculate the half-life of the material. T12- days Submit 3) How long from the beginning (when the activity was 114 Bq) did it take for the sample to reach an activity of 10 Bq? t...
A radioactive isotope has an activity of 9.98×104 Bq initially. After 3.00 hours the activity is...
A radioactive isotope has an activity of 9.98×104 Bq initially. After 3.00 hours the activity is 6.19×104 Bq. What is the half-life of the isotope? What is the activity after an additional 3.00 hours?
A radioactive isotope has an activity of 8.95×104 Bq initially. After 3.80 hours the activity is...
A radioactive isotope has an activity of 8.95×104 Bq initially. After 3.80 hours the activity is 5.64×104 Bq. What is the half-life of the isotope? What is the activity after an additional 3.80 hours?
A radioactive isotope has an activity of 8.01×104 Bq initially. After 3.85 hours the activity is...
A radioactive isotope has an activity of 8.01×104 Bq initially. After 3.85 hours the activity is 6.41×104 Bq. What is the half-life of the isotope? What is the activity after an additional 3.85 hours?
A radioactive isotope has an activity of 9.58×104 Bq initially. After 3.65 hours the activity is...
A radioactive isotope has an activity of 9.58×104 Bq initially. After 3.65 hours the activity is 5.94×104 Bq. What is the half-life of the isotope? What is the activity after an additional 3.65 hours?
As a radioactive specimen decays, its activity decreases exponentially as the number of radioacti...
I only need help with part c). Thanks!
As a radioactive specimen decays, its activity decreases exponentially as the number of radioactive atoms diminishes. Some radioactive species have mean lives in the millions (or even billions) of years, so their exponential decay is not readily apparent. On the other hand, many species have mean lives of minutes or hours, for their exponential decay is easily observed. According to the exponential decay law, the number of radioactive atoms that remain after...
36. A radioactive material initially is observed to have an activity of 1000 decays/sec. If three hours later it is observed to have an activity of 125 decays/sec, what is its half-life? A. 1/2 hour B. 1 hour C. 3 hours
A sample of radioactive material is initially found to have an activity of 114 Bq. After 4 days and 5 hours, the activity of the sample is found to be 85 Bq. 1) Calculate the disintegration constant of this material. 1 = 51 Submit 2) Calculate the half-life of the material. T12- days Submit 3) How long from the beginning (when the activity was 114 Bq) did it take for the sample to reach an activity of 10 Bq? t...
I only need help with part c). Thanks!
As a radioactive specimen decays, its activity decreases exponentially as the number of radioactive atoms diminishes. Some radioactive species have mean lives in the millions (or even billions) of years, so their exponential decay is not readily apparent. On the other hand, many species have mean lives of minutes or hours, for their exponential decay is easily observed. According to the exponential decay law, the number of radioactive atoms that remain after...
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