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The half the decaying substance is the amount of time it takes for the substance to...
logarithms can be used to calculate the time it takes for the original substance to decay...
logarithms can be used to calculate the time it takes for the original substance to decay to a specified amount. We wish to use this discussion to formulate ideas about the amount of time it takes for a radioactive substance to decay given a minimal amount of information. Assume we find a radioactive substance with a half-life of 4 days. Is it possible for us to determine the amount of time it takes for only one-eighth of the original amount...
The half-Me of a certain substance is 19 years How long will it take for a...
The half-Me of a certain substance is 19 years How long will it take for a sample of this substance to decay to 77% of its original amount? Use the exponential decay model A Ag et, to solve years Round to one decimal place as needed.)
How long will it take a sample of radioactive substance to decay to half of its...
How long will it take a sample of radioactive substance to decay to half of its original amount, if it decays according to the function A(t) = 250e - 223, where t is the time in years? Round your answer to the nearest hundredth year. A) 3.11 yr B) 55.75 yr 24.76 yr D) 27.87 yr
How long will it take a sample of radioactive substance to decay to half of its...
How long will it take a sample of radioactive substance to decay to half of its original amount, if it decays according to the function A(t) = 200e^-0.131t, where t is the time in years? Roud to the nearest hundredth year.
A radioactive substance decays at a rate proportional to the amount present at ime t (in...
A radioactive substance decays at a rate proportional to the amount present at ime t (in hours). Initially, Ao grams of the substance was present, and after 10 hours, the mount has decreased by 20% How long will it take the substance to decay to 40? hat is the half life of this substance? Hint: the half-life is the time required for half of the initial substance to decay)
h= half life a0 = original amount a(t) = amount present after t years t =...
h= half life
a0 = original amount
a(t) = amount present after t years
t = time
What information do you need?
TH 100 - D100 Use equation : acca un Page 4 of 5 4. Suppose we have Xo amount of a certain radioactive substance. It has been observed that this substance losses 5% of its mass every 10 years. @ How much of the initial mass Xo remains after 10 years? What about 20 years? (b) Use the...
2. Half-life is the time required for half of an amount of a particular compound to...
2. Half-life is the time required for half of an amount of a particular compound to degrade (see table below). The half-life of DDT in the soilis from 2 to 15 years, and the half-lite of DDT in an aquatic environment is 150 years. 1 half-life 2 half-lives 3 half-lives 4 half-lives 5 half-lives 50% degraded 75% degraded 88% degraded 94% degraded 97% degraded a. If the original concentration of DDT in the water is 2 ppm, how much DDT...
The number of grams A of a certain radioactive substance present at time, in years from...
The number of grams A of a certain radioactive substance present at time, in years from the present, t is given by the formula A=45e^-0.0045t What is initial amount of this substance What is half-life of this substance How much will be around in 2500 years
An unknown radioactive substance has a half-life of 3.20 hours. If 39.6 g of the substance...
An unknown radioactive substance has a half-life of 3.20 hours. If 39.6 g of the substance is currently present, what mass Ao was present 8.00 hours ago? Express your answer with the appropriate units. View Available Hint(s) ? OP HÅR A9 = Value O 2 Units Submit Part C Americium-241 is used in some smoke detectors. It is an alpha emitter with a half-life of 432 years. How long will it take in years for 34.0 % of an Am-241...
B) An unknown radioactive substance has a half-life of 3.20 hours. If 47.3 g of the...
B) An unknown radioactive substance has a half-life of 3.20 hours. If 47.3 g of the substance is currently present, what mass A0 was present 8.00 hours ago? Express your answer with the appropriate units. C) Americium-241 is used in some smoke detectors. It is an alpha emitter with a half-life of 432 years. How long will it take in years for 30.0 % of an Am-241 sample to decay? Express your answer with the appropriate units. D) A fossil...
The half-Me of a certain substance is 19 years How long will it take for a sample of this substance to decay to 77% of its original amount? Use the exponential decay model A Ag et, to solve years Round to one decimal place as needed.)
How long will it take a sample of radioactive substance to decay to half of its original amount, if it decays according to the function A(t) = 250e - 223, where t is the time in years? Round your answer to the nearest hundredth year. A) 3.11 yr B) 55.75 yr 24.76 yr D) 27.87 yr
A radioactive substance decays at a rate proportional to the amount present at ime t (in hours). Initially, Ao grams of the substance was present, and after 10 hours, the mount has decreased by 20% How long will it take the substance to decay to 40? hat is the half life of this substance? Hint: the half-life is the time required for half of the initial substance to decay)
h= half life
a0 = original amount
a(t) = amount present after t years
t = time
What information do you need?
TH 100 - D100 Use equation : acca un Page 4 of 5 4. Suppose we have Xo amount of a certain radioactive substance. It has been observed that this substance losses 5% of its mass every 10 years. @ How much of the initial mass Xo remains after 10 years? What about 20 years? (b) Use the...
2. Half-life is the time required for half of an amount of a particular compound to degrade (see table below). The half-life of DDT in the soilis from 2 to 15 years, and the half-lite of DDT in an aquatic environment is 150 years. 1 half-life 2 half-lives 3 half-lives 4 half-lives 5 half-lives 50% degraded 75% degraded 88% degraded 94% degraded 97% degraded a. If the original concentration of DDT in the water is 2 ppm, how much DDT...
An unknown radioactive substance has a half-life of 3.20 hours. If 39.6 g of the substance is currently present, what mass Ao was present 8.00 hours ago? Express your answer with the appropriate units. View Available Hint(s) ? OP HÅR A9 = Value O 2 Units Submit Part C Americium-241 is used in some smoke detectors. It is an alpha emitter with a half-life of 432 years. How long will it take in years for 34.0 % of an Am-241...
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