Nuclear disarmament could be accomplished if weaponswere not “replenished.” The tritium in warheads decays to he-lium with a half-life of 12.26 yr and must be replaced or the weapon is useless. What fraction of the tritium is lost in 5.50 yr?

Q: All the very heavy atoms found in the earth were created long ago by nuclear fusion reactions in a…

A:

Q: One of the hazards of nuclear explosions is the generation of 90Sr and its subsequent incorporation…

A: The present amount of 90Sr can be represented by radioactive decay law as, Here, N0, t1/2, t, and λ…

Q: When aboveground nuclear tests were conducted, the explosions shot radioactive dust into the upper…

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Q: The fusion reaction releases 3.27 MeV of energy. If a fusion reactor operates strictly on the basis…

A: According to company policy, only first three subparts will be answered here. Please post the rest…

Q: Plutonium isotope 239Pu decays by alpha decay with a halflife of 24 100 y. How many milligrams of…

A: The disintegration constant,

Q: A moon rock collected by a U.S. Apollo mission is estimated to be 4.00 billion years old by…

A: Given Mass (m)                      = 1.375 g Half-life of U238 t12 = 4.47×109  years Present time…

Q: Tritium is naturally rare, but can be produced by the reaction n +2H → 3H + γ . How much energy in…

A: The energy released from the following reaction can be calculated by finding out mass decay then…

Q: The β-particles emitted in the decay of 3H (tritium) interact with matter to create light in a…

A: Given- Activity (A) = 15.0 Ci = 15.0 Ci×1 Bq2.73×10-11Ci=5.49×1011Bq Half life of Tritium (t1/2)=…

Q: If a 3.16-g sample of an isotope having a mass number of 135 decays at a rate of 0.530 Ci, what is…

A: Given Mass of Isotope = 3.16 gram = 3.16×10-3 Kg Mass Number = 135  Rate of decay = 0.530 Ci As…

Q: Q20. What is the energy of the lowest-energy state of a system having 5 non-interacting electrons…

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Q: Mantles for gas lanterns contain thorium, because it forms an oxide that can survive being heated to…

A:

Q: The nucleus 10 4Be undergoes β- decay. The atomic mass of 10 4Be is 10.013535 u. (a) How much…

A: (a) 10Be radiates a β-particle and decays to 10B spontaneously. Let M, M0 and M1 denote the masses…

Q: 50Vhas one of the longest known radioactive half-lives. In a difficult experiment, a researcher…

A: N=Noe-λtNo is the number present at t=0 and λ is the decay constantλ=0.693t12The radioactive dating,…

Q: purchased by a medical supply house. If the sample has a half-life of 14 d, how long will it keep…

A: Just replace the values .... An its done

Q: Chromium's radioactive isotope 5'Cr has a half-life of 27.7 days and is often used in nuclear…

A: from the given information,

Q: To destroys cancerous tumor , a dose of gamma radiation totaling an energy of 2.12J is to be…

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Q: Radioactive 214^83 Bi has a half-life of 19.9 min if the activity of the radionuclide 1.2 hours…

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Q: In a living organism, a fixed fraction 1.30 × 10-12 of 12C is the radioactive isotope 14C, which has…

A:

Q: A nuclear physicist finds 1.0 μg of 236U in a piece ofuranium ore and assumes it is primordial since…

A: Given:- A nuclear physicist finds 1.0 μg of 236U in a piece ofuranium ore and assumes it is…

Q: Tritium is naturally rare, but can be produced by the reaction  n + 2H → 3H + γ.  How much energy in…

A: The atomic masses of the given particle/atom are given as,

Q: Unreasonable ResultsThe relatively scarce naturally occurring calcium isotope 48Ca has a half-life…

A: One half-life is said to have been passed when the radioactive isotope decays to 50% of its initial…

Q: (a) How many 239Pu nuclei must fission to produce a 20.0-kT yield, assuming 200 MeV per fission? (b)…

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Q: In the 1986 disaster at the Chernobyl reactor in eastern Europe, about 1 8 of the 137 Cs present in…

A: It is a measure of radiation dose to tissue. It is less fundamental than absorbed dose, but has…

Q: A moon rock collected by a U.S. Apollo mission is estimated to be 3.90 billion years old by…

A: Given, Half-life of U238 is 4.47 ×109 years

Q: The rate of spontaneous fi ssion in 238U is 6.7 decays per second for each kg of uranium present.…

A: Given,rate of  spontaneous fission in 238U R= 6.7 decays per second

Q: (a) Neutron activation of sodium, which is 100% 23 Na ,produces 24 Na , which is used in some heart…

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Q: Fallout from nuclear weapons tests in the atmosphere is mainly 90 Sr and 137Cs , which have 28.6-…

A: At the time of conducting nuclear tests and experiments, some of the product radioactive material,…

Q: A radioactive sample has a decay constant of 0.219 3/minute. (a) What is its half-life? (b) If at…

A: The relation between the half life and the decay constant is  T = 0.693λ The equation of…

Q: All the very heavy atoms found in the earth were created long ago by nuclear fusion reactions in a…

A: Given values: Half life of U235,  t12(U235)=7.04×108 yr Half life of U238,  t12(U238)=4.47×109 yr…

Q: A radium source contains 1.00 mg of 226Ra, which decays with a half-life of 1600 y to produce 222Rn,…

A:

Q: The half-life of 27Mg is 9.50 min. initially there were 3.70× 1012 27Mg nuclei present. How many…

A: Given: The half-life of 27Mg t1/2 = 9.50 min At t=0, the number of nuclei of 27Mg, N0 = 3.70× 1012…

Q: One method used to determine unknown atomic masses consists of precisely measuring the kinetic…

A: Write the reaction. 14Si30+8O18  →14Si34+8O14 +Q Let mass of 14Si34 be m 1 amu.c2=931.5 MeV

Q: A piece of charcoal used for cooking is found at the remains of an ancient campsite. A 1.19 kg…

A:

Q: The isotope 238 U decays to 206Pb with a half-life of 4.47 x 10° y. (Although the decay occurs in…

A: Given:For U to Pb decay half time is TPb = 4.47×109 yearsinital U mass, Mi = 0.76 + 0.17 mg =…