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?
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part A: How many years old is a sample of cesium-137 if the
sample emits only...
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...
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.
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.
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...
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 17-g sample. Find a function that models the mass remaining after t years. O m(t) = 20e -0.036 m(t) = 17e-0.0241 m(t) = 30e -0.0231 O m(t) = 20e -0.021 m(t) = 17e-0.0231
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:,
Select the keyword or phrase that will best complete each sentence. Key terms: Alpha particles are...
Select the keyword or phrase that will best complete each sentence. Key terms: Alpha particles are high-energy radiation released from a radioactive nucleus. Beta particles chain reaction are radioactive particles that have a negligible mass and a +1 critical mass charge. fission The is the amount of a radiactive element required to sustain a fusion chain reaction Gamma rays half-life Nuclear nucleus. is the joining together of two nuclei to form a larger limiting reactant nuclear reaction is the process...
Mass of neutron 1.0087 1u 931 MeV (e) A sample of radioactive caesium-137 with a haf...
Mass of neutron 1.0087 1u 931 MeV (e) A sample of radioactive caesium-137 with a haf life of 30 years emits f particles, each with an average energy of 0.5 MeV. The source has an activity of 2 x 1015 Bq and is used to provide power for a generator. Calculate the maximum initial power output (in Watts) of this generator, and the maximum power possible 20 years later [15 Marks] Turn Page Over PHYS002501 Waves and Particles January 2016
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,...
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...
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...
The half-life of cesium-137 is 30 years. Suppose we have a 17-g sample. Find a function that models the mass remaining after t years. O m(t) = 20e -0.036 m(t) = 17e-0.0241 m(t) = 30e -0.0231 O m(t) = 20e -0.021 m(t) = 17e-0.0231
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:,
Select the keyword or phrase that will best complete each sentence. Key terms: Alpha particles are high-energy radiation released from a radioactive nucleus. Beta particles chain reaction are radioactive particles that have a negligible mass and a +1 critical mass charge. fission The is the amount of a radiactive element required to sustain a fusion chain reaction Gamma rays half-life Nuclear nucleus. is the joining together of two nuclei to form a larger limiting reactant nuclear reaction is the process...
Mass of neutron 1.0087 1u 931 MeV (e) A sample of radioactive caesium-137 with a haf life of 30 years emits f particles, each with an average energy of 0.5 MeV. The source has an activity of 2 x 1015 Bq and is used to provide power for a generator. Calculate the maximum initial power output (in Watts) of this generator, and the maximum power possible 20 years later [15 Marks] Turn Page Over PHYS002501 Waves and Particles January 2016
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