(19) Remains recovered in a tomb are found to have 72% of its Carbon-14 remaining.  How old might this tomb be if the half-life of Carbon-14 is 5730 years? Group of answer choices A: 2716 yrs B: 3247 yrs C: 2952 yrs D: 1851 yrs E: 4157 yrs

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: Carbon-14 has a half-life of 5730 years. In a plant fossil, you find that the 14C14C has decayed to…

A: Half life of a radioactive decay is defined as the time required for the decay rate in the…

Q: Material found with the body had a C-14 activity of about 0.215 Bq per gram of carbon, where the A0…

A: The half life is t1/2=5730 yrs

Q: A radioactive source consists of 6.4 x 10^11 atoms of a nuclide of a half-life of 2 days. A second…

A: According to question we need to find--- After how many days will the number of radioactive atoms…

Q: What is the mass of 1ci of 227TH? If the half-life is 1.90 years. O m = 1.11x 10-2g O m = 1.21x…

A: T1/2 = 1620 years = 1620 x 3.15 x 107s λ = 0.693/ T1/2 = 0.693/(1620 x 3.15 x 107 s)

Q: Technetium-99 is an unstable isotope. Given a half-life of 8.01 hours, what is the activity (in…

A: Determine the decay constant.

Q: The half-life of carbon-14 is 5730 yrs. Find (a) its decay constant __________s-1 (b) the initial…

A:

Q: Choose the BEST answer to the following. A radioactive sample has a half-life of 1 hour. Starting…

A: The number of half -life passed in a time is,

Q: After 32 days, only 1/16 of a radioactive sample remains. What is the half-life of this sample?…

A:

Q: Mass spectrometric analysis of potassium and argon atoms in a Moon rock sample shows that the ratio…

A:

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

A:

Q: While exploring a coal mine, scientists found plant fossils which had been preserved by an…

A:

Q: What fraction of the 40K that was on Earth when it formed 4.5×109 years ago is left today?

A:

Q: If a 10-gram sample of a radioactive substance has a half-life of 6000 years, how much would be…

A: We are authorized to answer one question at a time, since you have not mentioned which question you…

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: What fraction of the 40K that was on Earth when it formed 4.5 X 109 years ago is left today?

A: Given data: Total time for formation of earth is, t=4.5×109 years. T

Q: Carbon is one of the fundamental elements in everything that's alive on Earth. The three naturally…

A: Carbon has generally three isotopes found in nature. Isotopes are those which have the same proton…

Q: The smallest 14C/12C ratio that can be reliably measured is about 3.0 * 10-15, setting a limit on…

A:

Q: Suppose there is a mineral body which contained some amount of 238U​, which has a​ half-life of…

A: half life of U-238 = 4.51×109 years After some time, U-238 atoms Lead atoms = 0.64

Q: An ancient club is found that contains 140 g of pure carbon and has an activity of 4 decays per…

A: Given Mass of carbon in ancient club = 140 gm Carbon activity = 4 decays /sec Living trees ratio of…

Q: 13. After two half-lives, how much of the original sample would remain? 50% 6.25% 12.5% 25%

A:

Q: . The activity of a radioactive sample decreases by 93.75 % in 2.5 years. What is the half-life of…

A:

Q: The half-life of 60CO is 5.27 years. The activity of an 60 Co sample is 2.60x10° Bq. You may want to…

A:

Q: An ancient rock is obtained from an excavation inside a mine. It is found that the ratio of the…

A: The formula of the radioactivity is  N =  No e-λ t where, N is the left over atoms, No is the…

Q: The half-life of radium-226 is 1.6 x 10 years. How long will it take for 20.0 mg of radium-226 to…

A:

Q: The half-life of a particular radioactive isotope is 6.5 h. If there are initially 48 * 1019 atoms…

A: Given:  Half life of isotope, T = 6.5 hours  Initial number of atoms, No = 48 x 1019 atoms  Total…

Q: Carbon-14 has a half-life of 5730 years. A sample of wood has been recovered by an archaeologist.…

A:

Q: Determine the age of a certain rock sample: carbon -14 half life = 5730 years. An archeology dig…

A: Given that: t0.5=5730 yrs.A=1 CpmA0=16 Cpmλ=?t=?

Q: Samples of seeds and plant matter from king tuntankhamun'sbtomb have a C-14 decay rate of 9.07…

A:

Q: If a 1.50-cm-thick piece of lead can absorb 90.0% of the γ rays from a radioactive source, how many…

A:

Q: A patient is injected with a radioactive isotope with a radiological half life of 12 days. The…

A: Option: A

Q: Radium-226, the first radioactive isotope used for its radioactive properties, has a half life of…

A: Radium-226 has a half-life, T12=23.0 centuries. The value of the rate constant is given by: λ=ln2T12…

Q: Given that radioactive cobalt-60 has a radioactive constant equal to 3.8 x 10° s determine its…

A: Given information: Here, λ is the radioactive constant or decay constant.

Q: What is the half-life of an isotope that decays to 6.25% of its original activity in 24.2 h?…

A:

Q: The activity of a particular radioactive nuclide falls from 1 x 1011 Bq to 2 x 1010 Bq in 10 hours.…

A:

Q: In the table below, the 2-H is called Deuterium; its Atomic Mass is 2.014102. Which choice below is…

A: Mass of Deuterium is given as = 2.014102 No of protons in hydrogen 1 = 1

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…

A:

Q: A sample of plutonium-239 has a mass of 24.0 mg. If after 72300 years 6.00mg are left, what is the…

A: Given data:  Initial quantity of plutonium (N0) = 24.0 mg Time elapsed (t) = 72300 years  Remaining…

Q: Technetium-99m is a radioactive isotope with a half-life of 6 hours. If a sample of was originally…

A:

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 232Th (half-life 1.4 × 1010 years) and 238U (half-life 4.5 × 109years) were present in equal…

A: Radioactivity is the process in which an unstable nuclei decays by the emission of nucleons to form…

Q: The half life of radium is 1.62x10^3years. What fraction of radium would remain after 1.0x10^3years?…

A:

Q: Americium-241 is used in smoke detectors. It has a first-order rate constant for radioactive decay…

A: The radioactive decay relation with the decay constant and radioactive sample quantity is given as…

Q: Radioactive nuclide, 9ºSr, has a half-life of 30 years. What percent of a sample of 9ºSr will remain…

A:

Q: The amount of radioactive 40K in a 70kg person is approximately 5000Bq. A) what is the number (N) of…

A: mass of person (m) = 70 kg Activity (A)  = 5000 Bq Half life of K40 = 1.25×109 years

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.