A 0.2-g sample of 386 Kr gas, which decays into stable Rb, is accidentally broken and escapes inside a sealed warehouse measuring 40 x 30 x 20 m. What is the specific activity of the air inside?
Q: What is the activity of a 20 ng sample of 92Kr, which has a half-life of 1.84 s?
A: In 92gm of 92Kr, will contain 6.02×1023 atoms of 92Kr.
Q: The Los Angeles County Police want to use neutron activation analysis to look for a tiny residue of…
A: The activity of a radioactive sample is defined as, Here t1/2 is the half life time of the…
Q: A sample has a ¹4C activity of 0.0052 Bq per gram of carbon. (a) Find the age of the sample,…
A:
Q: Sihle, an archaeologist from UWC finds an ancient wooden axe handle at an excavation site at…
A: Write the expression of decay rate. N=N0e-tt1/2
Q: In 1991, German tourists discovered the well-preserved remains of a man, now called “Ötzi the…
A: When scientists date a sample it is essential that the isotope which is used to date the sample…
Q: Calculate the activity of a pure 9.5-μgμg sample of 32 over 15P (T1/2=1.23×106s).
A: Mass of sample (m) = 9.5 ×10-6 grams Molecular mass of P-32 = 32 grams Half life (T1/2) = 1.23×106…
Q: A 1 kg block is attached to vertical rod by means of two strings. When the system rotates about the…
A: Option c is correct
Q: P5 A reindeer owner finds a 5-year-old reindeer roast in his freezer. When the steak was placed in…
A:
Q: How much is the mass of the sample in grams of Po-218 that has an activity of 5.00 x 1019 Bq? The…
A: Given Activity = rate of disintegration = 5 × 1019 Bq = 5 × 1019 disintegration/second Half life =…
Q: A 5,560 Ci 60 Co source used for cancer therapy is considered too weak to be useful when its…
A: Given, The activity of C60o used for cancer therapy = 5,560 Ci = R0 The reduced activity of C60o…
Q: The charred bones of a sloth in a cave in Chile represent the earliest evidence of human presence at…
A: Given, Specific activity of bone (N)=5.22 disintegrations per minute per gram of carbon (d/min.g).…
Q: Gamma rays may be used to kill pathogens in ground beef. One irradiation facility uses a 60C source…
A: Given: The activity of gamma rays is A=1×106 The energy of first gamma ray is E1=1.17 MeV. The…
Q: A sample has a ¹4C activity of 0.0052 Bq per gram of carbon. (a) Find the age of the sample,…
A: The amount of carbon-14 in a living thing is constant. As a result of radioactive decays, carbon-14…
Q: 10.10. A sample of wood from an Egyptian mummy case has a specific activity of 9.41 d/min-g. How old…
A:
Q: 1mg of (210) po decays to have a half-life of 138.3 days for a period of one year. What is the…
A: Given Initial amount, M=1mg=10-3g Half-life, T1/2=138.3 days=1.2×107s Time period, t=1 yr= 3.15×107s…
Q: . A saline solution of 24Na with an activity of 300 kBq is injected into the bloodstream of one…
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Q: John is a nuclear worker and has a mass of 70 kg. He was exposed to 10 Ci 137Cs source…
A: A substance with unstable nuclei undergoes radioactive decay. A radioactive substance decays…
Q: (Hand by written ans.)Mantles for gas lanterns contain thorium, because it forms an oxide that can…
A:
Q: What size disinfection chamber will be needed to achieve a 3 log disinfection of viruses, using…
A: 3 log reduction means 99.9% reduction of bacteria. Let the initial bacteria present be x. After 3…
Q: (a) Determine the product of the reaction Li + *He → ? + n. → Help chemPad |Xu|X| Greek (b) What is…
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Q: A 85 kg patient swallows a 31 μCi beta emitter with a half-life of 5.0 days, and the radioactive…
A: Given data: The mass of the patient is m=85 kg. The radiation is R=31 μCi. The half-life is…
Q: Many transuranium elements, such as neptunium-240, have very short half-lives. (For 24 Np, the…
A: The Neptunium atom consists of 93 protons and 147 neutrons. The mass of Np93240 nucleus is given as,…
Q: radiation lab orders 64 Ci of P-32. After 42.9 days the activity of the sample is 8.0 Ci. What is…
A:
Q: A piece of charcoal used for cooking is found at the remains of an ancient campsite. A 1.00-kg…
A: Solution: Given that mass m = 1 kg Living material has an activity equal to 15.0 decays/min per…
Q: A sample of shale contains 0.055% 238U by weight. Calculate the number of spontaneous fi ssions in…
A: Given: A sample of shale contains 0.055% 238U by weight. Calculate the number of spontaneous fi…
Q: A radioactive sample of 60Co (t1/2 = 5.271 y) has a β - activity of 4.4 x 107 Bq. How many grams of…
A: Given: A radioactive sample = 60Co (t1/2 = 5.271 y) β - activity = 4.4 x 107 Bq Need to find how…
Q: A 5.0 x 105 Bq 241Am alpha source is used in a smoke alarm. The device is arranged so that 15% of…
A: (a) The alpha particles that detected by the device is I=15%R×q (1) Here, q is the Charge of an…
Q: Find the activity A of a sample containing 4E-6 g of Co (T1/2 = 5.27 years). (Use 59.93 u as the…
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Q: Samarium-153, a radioactive isotope with a half-life of approximately 48 hours, is used to treat…
A: Given, Half life, T1/2=48hours=2 days
Q: Enter your result in MeV to 2 decimal places
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Q: CSDA range Determine the expected range of 2 MeV beta radiation in polyethylene, Aluminium and air.…
A: Collision stopping power is the average rate of energy loss per unit path length caused by Coulomb…
Q: How long does it take for the activity of a sample of sodium-22, which has a half-life of 2.6 y, to…
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Q: What is the activity in Ci of a 2.6 mg sample of 3H? VE ΑΣΦ Ro = What is the activity in Bq of a 2.6…
A:
Q: Sihle, an archaeologist from UWC finds an ancient wooden axe handle at an excavation site at…
A:
Q: The beta-emitter nuclide Pm-147 can serve as a radionuclide power source. How much thermal power in…
A: Given: Given mass of the element m = 500 g.
Q: On March 11, 2011, a magnitude 9.0 earthquake struck northwest Japan. The tsunami that followed left…
A:
Q: A drug tagged with Tc (half-life= 6.05 h) is prepared for a patient. If the original activity of the…
A: Given:-Original activity (Ao)=1.1*104 Bq.Time (t) = 1.8 hoursHalf life = 6.05 hFind Activity…
Q: You are hired as an expert witness for the defense of an employee who is being sued for exposing his…
A: The initial number of oxygen atoms Half-life time, The time interval,
Q: Calculate the activity due to 14C in 1.00 kg of carbon found in a living organism. Express the…
A: The formula of activity is,
Q: (DIFF:D)A living specimen in equilibrium with the atmosphere contains one atom of 14C (half-life = 5…
A:
Q: A 70-kg worker is accidentally exposed for 2.0 minutes to a 21-mCi source of beta radiation from a…
A: (a) Let M, T, and R denote the person’s mass, the time for exposure, and the radioactive sample’s…
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