the gamma decay of a substance is 8642 counts/min. After two weeks, radioactivity is 753 counts/min....
the gamma decay of a substance is 8642 counts/min. After two weeks, radioactivity is 753 counts/min. In days, what is the half-life of this substance?
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the gamma decay of a substance is 8642 counts/min. After two
weeks, radioactivity is 753 counts/min....
Measurements of the radioactivity of a certain isotope tell you that the decay rate decreases from...
Measurements of the radioactivity of a certain isotope tell you that the decay rate decreases from 8355 decaysperminute to 3085 decaysperminute over a period of 4.50 days . What is the half-life T1/2 of this isotope? (in days)
Review Constants Periodic a substance active times that the countable and will therefore decay by my...
Review Constants Periodic a substance active times that the countable and will therefore decay by my name of processes the decay Del decay of the day of radioactive comm o der Therefore theme of daycan t orbed by the megrated w omen e n we used to describe the food chemical con In where the mo s t coloraty t he com by man of these quo ng 0. the world when contre long for fraction remaining - - (0.5)"...
Measurements of the radioactivity of a certain isotope tell you that the decay rate decreases from...
Measurements of the radioactivity of a certain isotope tell you that the decay rate decreases from 8315 decaysperminute to 3040 decaysperminute over a period of 4.00 days .What is the half-life T1/2 of this isotope? T_ ( 1 / 2 )?? ____ Days
Measurements of the radioactivity of a certain isotope tell you that the decay rate decreases from...
Measurements of the radioactivity of a certain isotope tell you that the decay rate decreases from 8350 decaysperminute to 3015 decaysperminute over a period of 5.00 days .What is the half-life T1/2 of this isotope?
Measurements of the radioactivity of a certain isotope tell you that the decay rate decreases from...
Measurements of the radioactivity of a certain isotope tell you that the decay rate decreases from 8325 decays per minute to 3065 decays per minute over a period of 4.50 days. What is the half-life T1/2 of this isotope?
Modeling Exponential Growth and Decay A scientist begins with 240 grams of a radioactive substance. After...
Modeling Exponential Growth and Decay A scientist begins with 240 grams of a radioactive substance. After 250 minutes, the sample has decayed to 34 grams. a. Rounding to four decimal places, write an exponential equation, R(t) = Aekt, representing this situation, using the variablet for minutes. R(O) = b. To the nearest minute, what is the half-life of this substance? The half-life is approximately minutes.
After the sudden release of radioactivity from the Chernobyl nuclear reactor accident in 1986, the radioactivity...
After the sudden release of radioactivity from the Chernobyl nuclear reactor accident in 1986, the radioactivity of milk in one region of Poland rose to 1450 Bq/L due to iodine-131 present in the grass eaten by dairy cattle. (Note that the radioactivity was higher in other regions of Poland.) Radioactive iodine, with half-life 8.04 days, is particularly hazardous because the thyroid gland concentrates iodine. The Chernobyl accident causeda measurable increase in thyroid cancers among children in Belarus. (a) For comparison,...
(2 points) An unknown radioactive element decays into non-radioactive substances. In 520 days the radioactivity of...
(2 points) An unknown radioactive element decays into non-radioactive substances. In 520 days the radioactivity of a sample decreases by 63 percent. (a) What is the half-life of the element? half-life: (days) (b) How long will it take for a sample of 100 mg to decay to 84 mg? time needed: (days)
The C-14 activity of a wooden sample is 29.1 counts/min as compared to an activity of...
The C-14 activity of a wooden sample is 29.1 counts/min as compared to an activity of 58.2 counts/min for a standard zero age. The half-life for C-14 decay is 5715 years. Calculate the age of the sample. a) 7755 yr b) 2822 yr c) 1355 yr d) 228.8 yr e) 5715 yr
A chemical substance has a decay rate of 745 per day. The rate of change of...
A chemical substance has a decay rate of 745 per day. The rate of change of an amount of the chemical is given by the equation -0074N where is the number of days since decay began. Complete parts a) through c) a) Let No represent the amount of the chemical substance att. Find the exponential function that models the situation N) – Ng. b) Suppose that 400 g of the chemical substance is present att0 How much will remain after...
Review Constants Periodic a substance active times that the countable and will therefore decay by my name of processes the decay Del decay of the day of radioactive comm o der Therefore theme of daycan t orbed by the megrated w omen e n we used to describe the food chemical con In where the mo s t coloraty t he com by man of these quo ng 0. the world when contre long for fraction remaining - - (0.5)"...
Modeling Exponential Growth and Decay A scientist begins with 240 grams of a radioactive substance. After 250 minutes, the sample has decayed to 34 grams. a. Rounding to four decimal places, write an exponential equation, R(t) = Aekt, representing this situation, using the variablet for minutes. R(O) = b. To the nearest minute, what is the half-life of this substance? The half-life is approximately minutes.
After the sudden release of radioactivity from the Chernobyl nuclear reactor accident in 1986, the radioactivity of milk in one region of Poland rose to 1450 Bq/L due to iodine-131 present in the grass eaten by dairy cattle. (Note that the radioactivity was higher in other regions of Poland.) Radioactive iodine, with half-life 8.04 days, is particularly hazardous because the thyroid gland concentrates iodine. The Chernobyl accident causeda measurable increase in thyroid cancers among children in Belarus. (a) For comparison,...
(2 points) An unknown radioactive element decays into non-radioactive substances. In 520 days the radioactivity of a sample decreases by 63 percent. (a) What is the half-life of the element? half-life: (days) (b) How long will it take for a sample of 100 mg to decay to 84 mg? time needed: (days)
A chemical substance has a decay rate of 745 per day. The rate of change of an amount of the chemical is given by the equation -0074N where is the number of days since decay began. Complete parts a) through c) a) Let No represent the amount of the chemical substance att. Find the exponential function that models the situation N) – Ng. b) Suppose that 400 g of the chemical substance is present att0 How much will remain after...
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