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The half-life of cesium-137 is 30 years. Suppose we have a 17-g sample. Find a function...
The half-life of cesium-137 is 30 years. Suppose we have a 89 g sample. Find a...
The half-life of cesium-137 is 30 years. Suppose we have a 89 g sample. Find a function that models the mass m remaining after t years.
13. The half ife of cesium-137 is 30 years. Suppose we have a 25g sample. a....
13. The half ife of cesium-137 is 30 years. Suppose we have a 25g sample. a. (1 that models the mass remaining after t years l point) Find a function m)- m,2 13a b. (2 points) Find a function me)me-" that models the mass remaining after t years In 2 (recall that r I), Do Not round. 13b: 2 points) How much of the sample will remain after 95 years? Round to the nearest ten-thousandth C. ( 13c:,
The half-life of cesium-137 is 30 years. Suppose we have a 18-gram sample. (a) Find the...
The half-life of cesium-137 is 30 years. Suppose we have a 18-gram sample. (a) Find the yearly growth factor a. (Round your answer to five decimal places.) a = (b) Find an exponential model m(t) = Cat for the mass remaining after t years. m(t) = (c) How much of the sample will remain after 85 years? (Round your answer to two decimal places.) g (d) After how long will only 3 g of the sample remain? (Round your answer...
Cesium-137 has a half-life of 30 years. If you start with 1.0 g of 137Cs, how...
Cesium-137 has a half-life of 30 years. If you start with 1.0 g of 137Cs, how much 137Cs will be remaining after 60 years? O 0.30 g O 0.50 g O 0.90 g O 0.00 g O 0.25 g SUBMIT
An isotope of cesium (Cesium-137) has a half-life of 30 years. If 1.0 mg of cesium-137...
An isotope of cesium (Cesium-137) has a half-life of 30 years. If 1.0 mg of cesium-137 disintegrates over a period of 90 years, how many mg of cesium-137 would remain? 14. Thallium-208 has a half-life of 3.053 min. How long will it take for 120.0g to decay to 7.500 15. Element-106 has a half-life of 0.90 seconds. If one million atoms of it were prepared, how many atoms would remain after 4.5 seconds? 16. A 2.5 gram sample of an...
Cesium- 137, a beta emitter, has a half-life of 30y. - How many grams of a...
Cesium- 137, a beta emitter, has a half-life of 30y. - How many grams of a 16g sample of Cesium- 137 would remain after 90y. - How many years will be needed for a 28g of Cesium- 137 to devay to 3.5 g of Cesium- 137.
Cesium-137, used in cancer treatment, has a half- life of 30 years. are here 1974 used...
Cesium-137, used in cancer treatment, has a half- life of 30 years. are here 1974 used in cancer treatment, has a half- Part A Enter the balanced nuclear equation for the beta decay (e) of cesium-137 Express your answer as a nuclear equation. Α. ΑΣφ on? Subrnit Previous Answers Request Answer Part B How many milligrams of a 24 mg sample of cesium-137 remain after 120 years? Express the mass to two significant figures and include the appropriate units. Value...
part A: How many years old is a sample of cesium-137 if the sample emits only...
part A: How many years old is a sample of cesium-137 if the sample emits only 35.2% of its initial radioactivity? The half-life of cesium-137 is 30.2 years part B Where does the tiny amount of mass go when a nuclear reaction takes place? What should the sign on the change in energy be when mass is lost in a nuclear reaction? Why?
9. [-14 Points] DETAILS SPRECALC7 4.6.017. This exercise uses the radioactive decay model. The half-life of...
9. [-14 Points] DETAILS SPRECALC7 4.6.017. This exercise uses the radioactive decay model. The half-life of radium-226 is 1600 years. Suppose we have a 28-mg sample. (a) Find a function m(t) = moz-th that models the mass remaining after t years. m(t) = (b) Find a function m(t) = moet that models the mass remaining after t years. (Round your value to six decimal places.) m(L) = (c) How much of the sample will remain after 2500 years? (Round your...
1. The half-life of carbon-14 is 5730 years. A sample is found to have one-eighth the...
1. The half-life of carbon-14 is 5730 years. A sample is found to have one-eighth the original amount of carbon-14 in it. How old is the sample? 5730 years, 716 years, 45800 years, 17200 years 2. Why wouldn't you use carbon-14 dating on a piece of shell that was estimated to be 1 million years old? Sea shells do not have radioisotopes, carbon dating is only useful on plants, uranium dating is better for items older than 1/2 million years,...
13. The half ife of cesium-137 is 30 years. Suppose we have a 25g sample. a. (1 that models the mass remaining after t years l point) Find a function m)- m,2 13a b. (2 points) Find a function me)me-" that models the mass remaining after t years In 2 (recall that r I), Do Not round. 13b: 2 points) How much of the sample will remain after 95 years? Round to the nearest ten-thousandth C. ( 13c:,
Cesium-137 has a half-life of 30 years. If you start with 1.0 g of 137Cs, how much 137Cs will be remaining after 60 years? O 0.30 g O 0.50 g O 0.90 g O 0.00 g O 0.25 g SUBMIT
An isotope of cesium (Cesium-137) has a half-life of 30 years. If 1.0 mg of cesium-137 disintegrates over a period of 90 years, how many mg of cesium-137 would remain? 14. Thallium-208 has a half-life of 3.053 min. How long will it take for 120.0g to decay to 7.500 15. Element-106 has a half-life of 0.90 seconds. If one million atoms of it were prepared, how many atoms would remain after 4.5 seconds? 16. A 2.5 gram sample of an...
Cesium-137, used in cancer treatment, has a half- life of 30 years. are here 1974 used in cancer treatment, has a half- Part A Enter the balanced nuclear equation for the beta decay (e) of cesium-137 Express your answer as a nuclear equation. Α. ΑΣφ on? Subrnit Previous Answers Request Answer Part B How many milligrams of a 24 mg sample of cesium-137 remain after 120 years? Express the mass to two significant figures and include the appropriate units. Value...
9. [-14 Points] DETAILS SPRECALC7 4.6.017. This exercise uses the radioactive decay model. The half-life of radium-226 is 1600 years. Suppose we have a 28-mg sample. (a) Find a function m(t) = moz-th that models the mass remaining after t years. m(t) = (b) Find a function m(t) = moet that models the mass remaining after t years. (Round your value to six decimal places.) m(L) = (c) How much of the sample will remain after 2500 years? (Round your...
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