A 25g piece of charcoal is discovered in a prehistoric cave. Carbon 14 of the sample shows a radioactive activity of 250 disintegrations / minute. If we estimate that originally the decay was 376 decays / minute, for how long is the tree from which the carbon sample was taken dead? The half-life of carbon-14 is 5730 years.

Q: A certain radioactive nuclide decays with a disintegration constant of 0.0256 h1 (a) Calculate the…

A: Given(s): Decay constant, λ=0.0256 h-1 Require: Half-life, t12=? Fraction of sample left after,…

Q: The activity of a freshly prepared radioactive sample with a half-life of 4 days is 1000 Bq. How…

A: Given : t1/2 = 4 days No = 1000 Bq N = 250 Bq

Q: You are an archaeologist, and send some leather clothing found at a burial site to be radiocarbon…

A: The general formula for the activity as a function of time t is given by, Here, A, Ao, λ and t…

Q: A 44.5 g sample of carbon has an activity of 8.55 decays per second. How old is it? Please give your…

A: Given data The mass of the sample of carbon is given as m = 44.5 kg.  The number of decays is given…

Q: If we split a nucleus into two smaller nuclei, with a release of energy, has the average binding…

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Q: A man, whose lungs are on average filled with 1 liter of inhaled air, lives in a house with a radon…

A: Given(s): Average inhaled air= 1 lit. Radon gas activity, A=1.0 x10-12 Curie/liter. Require:…

Q: If a 1.90 cm thick piece of lead can absorb 90.0% of the γ rays from a radioactive source, how many…

A:

Q: The radiocarbon content of 14C decreases after the death of a living system with a half-life of 5730…

A: The formula of the radioactivity is given below where, T is the half life, t is the time, Ro is the…

Q: The half-life of Erbium-172 is 49.3 hours. What is the hourly decay rate? Express the result to four…

A: Given data The half-life of erbium 172 is given as t = 49.3 hours.   Now, the hourly decay rate is…

Q: Assume that the decay rate for Carbon 14 is k=0.00012. If charcoal found in an ancient fire pit…

A:

Q: A certain radioactive nuclide decays with a disintegration constant of 0.0137h1. (a) Calculate the…

A: Given  Disintegration constant λ=0.0137 h-1 (a)  half life T1/2 =0.693λ T1/2= 0.693/0.0137…

Q: The shroud of Turin, which shows the negative image of the body of a man who appears to have been…

A: Given: The half-life of carbon-14 is 5,730 years, but we need to calculate the value of the k

Q: An artifact classified as charcoal, found in a site at Epirus, Greece, is found to have a 14C…

A: initial radioactivity(Ro)=0.255 counts per second final radioactivity(R)=4.36 X 10-2 counts per…

Q: he half-life of 222Rn is 3.82 days. (a) Convert the half-life to seconds.      Answer: _______…

A: Since we only answer up to 3 sub-parts, we’ll answer the first 3. Please resubmit the question and…

Q: A freshly prepared sample of a certain radioactive isotope has an activity of 3.7 × 1011 decays/s.…

A: Relation between activity of the radioactive isotope and half life…

Q: Suppose you have a 1 g sample of 226Ra, half-life 1600 years. How long will it be until only 0.1 g…

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Q: A radioisotope has a half-life of 5.00min and an initial decay rate of 8000 Bq. (1.) What will be…

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Q: A radioactive nucleus has half-life T1/2. A sample containing these nuclei has initial activity R0…

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Q: A sample of radioisotope has a decay constant of 9.976x10s1 and prepared with an initial activity of…

A:

Q: Both 1) Equation for a radioactive decay of a nucleus is  dNdTdNdT=−??. Given decay constant is λ =…

A: The question is regarding radioactive decay of the nucleus and half life.

Q: A sample of radioisotope has a decay constant of 9.976✕10-7 s-1 and prepared with an initial…

A: Given data: The decay constant of a sample of a radioisotope is, The initial activity of a sample…

Q: P239u is a nuclear waste byproduct with a half-life of 24,000 y. What fraction of P239u present…

A: The formula for remaining nuclei in terms of half life  N=N012tt1/2

Q: if the parent nucleus in an a decay is 22388 Ra, what is the daughter nucleus? if the parent…

A: a) Given that alpha decay is happening in alpha decay the nucleus emits an alpha particle, which is…

Q: The 222Rn isotope has a half-life of 3.83 days. (a) Determine the decay constant (in s1) for this…

A: An isotope is defined as one or more chemically identical nuclides. Isotopes have the same number of…

Q: Natural potassium contains 40K, which has a half-life of 1.277 ✕ 109 y. What mass (in g) of 40K in a…

A:

Q: The radionuclide 64Cu has a half-life of 12.7 h. If a sample contains 5.50 g of initially pure 64Cu…

A: Half-life of 64Cu,

Q: A radioactive nuclide has a half-life of 30.0 y.What fraction of an initially pure sample of this…

A: a)

Q: A rock contains 0.257 mg of Pb-206 for everv milligram of U-238.The half-life for the decay of U-238…

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Q: The half life for the radioactive decay of Ce-141 is 32.5 days. If the sample has an activity of 4.0…

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Q: The half-life of 23U is 4.5 x 10° yr. A sample of rock of mass 1.6 g produces 29 dis/s. Assuming all…

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Q: The half-life of a radioactive nuclide is 20 years. If a sample of this nuclide has an activity of…

A: Formula of radioactivity is as follows: I=I0e-λt…

Q: The radioactive isotopes of lead PB 209,decays at a rate proportional to the amount present at time…

A: Radioactivity N=N0e-0.693tT1/2t=-T1/20.693lnNN0

Q: if the daughter nucleus in an a decay is 22488 Ra, what is the parent nucleus

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Q: The half-life of 30P is 2.50 minutes. If a sample of 30P has 1.60 x 1010 nuclei present initially,…

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Q: 5.1 The half-life of radioactive nucleus of Ra is about 1.6 x 10³ years. 88 5.1.1 What is the decay…

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Q: A radioactive sample contains 3.2. atoms of a particular nuclide and emits 3600 a- particles per…

A: Given:Radioactive sample,α=3.2×1018 atomsRate=3600 perticle/secondFind the decay constant,k of the…

Q: If the activity of a sample of radioactive material is initially 10 Ci and the half-life of the…

A: A=A0e-λt=A0e-0.693t1/2t

Half Life

The concept of Half Life has numerous practical applications some of them includes figuring out the effective drug dosage to finding out when a radioactive becomes safe to use. If you look for a career in Nuclear Physics you will need this concept.