51. An accident at a nuclear power plant has left the surround- ing area polluted with radioactive material that decays nat- urally. The initial amount of radioactive material present is 15 su (safe units), and 5 months later it is still 10 su. Write a formula giving the amount A(t) of radioactive material (in su) remaining after 1 months.

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A: Given information: The half life h =11 min, there are 300g of element X. To find: The time it will…

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Q: 3. A small metal bar, whose initial temperature was 20° C, is dropped into a large container of…

A: Let's find.

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A: We will find out the required value.

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Q: A certain radioactive element decays over time according to the equation where 4= the number of…

A: Solution attached below

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Q: 2) A body temperature of 50 °F is placed in an oven whose temperature is kept at 150 °F. If after…

A: time required for the body to reach 100°F=?

Q: carbon-14? The decay​ rate, k, of​ carbon-14 is

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Q: Total reserves for a non renewable resource at 250 million tones.annual  consumption, currently at…

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Q: 1. A man takes 40 mg of a certain medicine. Each hour, the amount of medicine in the man's system…

A: Let's find.

Q: The half-life of carbon-14, 14C, is approximately 5,730 years. A bone fragment is estimated to have…

A: Given information: Initial amount=Q0=7 mgHalf life=t12=5730 years

Q: 9. The mass of a radioactive substance is 400mg and decreases by 6% per year. What is its mass after…

A: The mass of the radioactive substance is 400mg and decreases by 6% per year.

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Q: 3. The population of a certain country is known to increase at a rate proportional to the number of…

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Q: 5. A yeast grows at a rate proportional to its present size. If the original amount doubles in four…

A: Aap per our guidelines we can solve only one question at a time. Please repost unsolved questions…

Q: The half-life of radioactive strontium-90 is approximately 31 years. In 1960, radioactive…

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Q: Radon-222 has a half-life of 4.00 days. Given its mass 3.055 gram at a certain time, what was the…

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Q: 7. A radioactive material decays at a rate proportional to its amount. If the material has a…

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Q: Radium decomposes at a rate proportional to the amount present. If the half-life is 1600 years, find…

A: NOTE: Refresh your page if you can't see any equations. . the initial amount is a=100% half-life is…

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Q: Radon-222 has a half-life of 4.00 days. Given its mass 2.789 gram at a certain time, what was the…

A: We will find out the required value.

Q: At the beginning of an experiment, a scientist has 228 grams of radioactive goo. After 135 minutes,…

A: Given that: P=the initial amount= 228 Time=t=135 minutes A=final amount= 3.5625 r=rate    Using the…

Q: After 15 years, one fourth of the initial mass of radioactive substance has decayed. a) Find the…

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Q: 22)  A linen artifact found in a crypt contains 95 percent of the carbon-14 that is present in…

A: Given that: Half life of carbon=5730 yearsPercentage of carbon present=95%

Q: The amount of radioactive radium, whose half-life is 1620 years, remaining after t years, is given…

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Q: 1. The half-life of a radioactive material is 41.44 minutes. Starting with 840.7 grams of the…

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Q: 2. The half-life of a radioactive material is 22.52 hours. If you measure 88.95 grams of the sample…

A: Half-life is the time required for a quantity to reduce to half of its initial value. The term is…

Q: 4. A deposit of $400 is made in an account that earns interest at an annual rate of 2.5%. How long…

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Q: 5. A small metal bar, whose initial temperature is 20°C, is dropped into a container of boiling…

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Q: 2. Half-life of a DNA of an extinct moa is 521 years. A 1 mg sample was estimated to be 6000 years…

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Q: Express the hourly decay rate as a percentage to two decimal places.The half-life of Erbium-172 is…

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Q: The half life of a decaying substance is the amount of time it take for the substance to reduced to…

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Q: 10. The mass of a radioactive substance is 1000mg and decreases by 7% per year. What is its mass…

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Q: Radium decomposes at a rate proportional to the amount present. In 100 yrs, 100 mg of radium…

A: Initial radium quantity Ni = 100 mg after t = 100 years N = 96 mg

Q: 2. An object with a temperature of 32°C is taken to an open field where the temperature is 42°C.…

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Q: half-life of Palladium-100 is 4 days

A: We have to find out the initial mass and the mass after 6 weeks.

Q: 28. A certain population of bacteria is known to grow at a rate proportional to the amount present…

A: .as per our norms we are allowed to solve one question at a time: Kindly repost the remaining…

Q: 6. Determine the initial amount of radioactive substance if after 22 years, the remaining…

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Q: 14) Suppose that the formula y = yoe015t represents the number of bacteria present in a culture…

A: We want to find number of bacterias present after 12 hours from the given function.

Q: Radon-222 has a half-life of 4.00 days. Given its mass 3.168 gram at a certain time, what was the…

A: We will find out the required solution.