A building has become contaminated with radioactivity. The longest-lived material in the building is strontium-90 which...
A building has become contaminated with radioactivity. The longest-lived material in the building is strontium-90 which has a half-life of 29.1 years. Assume the building initially contained 5.0 kg of this substance and the safe level is less than 10 decays/minute. How long does the building remain unsafe? How many atoms of strontium-90 remain when the building becomes safe?
Homework Answers
Please let me know if it was helpful. Thank you!
Add Answer to:
A building has become contaminated with radioactivity. The longest-lived material in the building is strontium-90 which...
One radioactive material that is produced in atomic bombs is the isotope strontium-90, which has a...
One radioactive material that is produced in atomic bombs is the isotope strontium-90, which has a half-life of 28 years. If a person is exposed to strontium-90, it can collect in human bone tissue, where it can cause leukemia and other cancers. If an atomic bomb test site is contaminated by strontium-90, how long will it take for the radioactive material to decay to 30% of the original amount? (Round the growth factor to eight decimal numbers. Round your answer...
Strontium 90 is a radioactive material that decays according to the function A()-A 00244t, where Ao...
Strontium 90 is a radioactive material that decays according to the function A()-A 00244t, where Ao is the initial amount time t (n years). Assume that a scientist has a sample of 500 grams of strontium 90 (a) What is the decay rate of strontium 90? (b) How much strontium 90 is left after 10 years? (c) When will only 400 grams of strontium 90 be left? (d) What is the half-life of strontium 902 (a) What is the decay...
Strontium-90 has a half-life of 28.1 years. Starting with 3.2 mg of this isotope, how much...
Strontium-90 has a half-life of 28.1 years. Starting with 3.2 mg of this isotope, how much would remain after 112.4 years?
Yttrium 90, which has a half-life of 64.2 h, is produced from the fission product strontium...
Yttrium 90, which has a half-life of 64.2 h, is produced from the fission product strontium 90 which has a half-life of 27.5 years. How much Y-90 will be present after I week from a sample of pure Sr-90 in a closed container? Ans.: 0.00027
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...
In a certain building at a top-secret research lab, some yttrium-90 has leaked into the computer...
In a certain building at a top-secret research lab, some yttrium-90 has leaked into the computer analysts' coffee room. The leak would currently expose personnel to 150 millirems of radiation a day. The half-life of the substance is about three days; that is, the radiation level is only half of what it was three days ago. The analysts want to know how long it will be before the radiation is down to a safe level of 0.466 millirems a day....
10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated...
10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated sludge operation that adversely affect effluent quality with origins in the engineering, hydraulic and microbiological components of the process. The real "heart" of the activated sludge system is the development and maintenance of a mixed microbial culture (activated sludge) that treats wastewater and which can be managed. One definition of a wastewater treatment plant operator is a "bug farmer", one who controls the aeration...
Strontium 90 is a radioactive material that decays according to the function A()-A 00244t, where Ao is the initial amount time t (n years). Assume that a scientist has a sample of 500 grams of strontium 90 (a) What is the decay rate of strontium 90? (b) How much strontium 90 is left after 10 years? (c) When will only 400 grams of strontium 90 be left? (d) What is the half-life of strontium 902 (a) What is the decay...
Strontium-90 has a half-life of 28.1 years. Starting with 3.2 mg of this isotope, how much would remain after 112.4 years?
Yttrium 90, which has a half-life of 64.2 h, is produced from the fission product strontium 90 which has a half-life of 27.5 years. How much Y-90 will be present after I week from a sample of pure Sr-90 in a closed container? Ans.: 0.00027
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...
Most questions answered within 3 hours.
-
Suppose that on a temperature scale X, water boils at 203.0°X
and freezes at -105.7°X. What...
asked 8 minutes ago -
BaS crystallizes in a cubic unit cell with S2- ions on each
corner and each face....
asked 39 minutes ago -
A. 0≤P(Oi)≤10≤P(Oi)≤1 for each i
B. P(Oi)≤0P(Oi)≤0
C. P(Oi)=1+P(OCi)P(Oi)=1+P(OiC)
D. P(Oi)≥1P(Oi)≥1
If an experiment consists of...
asked 2 hours ago -
A battery has an emf of 9.20V and an internal resistance of 1.20
ohm. a)What resistance...
asked 2 hours ago -
The area of an elastic circular loop decreases at a constant
rate, dA/dt = −6.60×10−3 m2/s...
asked 3 hours ago -
The denaturation of proteins can be described by the
equilibrium
F⇌U
where F and U represent...
asked 4 hours ago -
Please answer what the maximum and minimum force is, and the
angle on the ion is...
asked 4 hours ago -
implement a program that reads a number of rows and a symbol.
The program will draw...
asked 4 hours ago -
Assume that when adults with smartphones are randomly selected,
45% use them in meetings or classes....
asked 4 hours ago -
Determine the number of formula units of
Na2SO4 and moles of oxygen contained in 8.11
moles...
asked 5 hours ago -
Explain in steps on the following code
What would be the output when executed
using System;...
asked 5 hours ago -
Given the information in the table, which of the following
statements is CORRECT?
Stock A
Stock...
asked 5 hours ago