Tritium (half-life = 12.3 yr) is used to verify the age of expensive brandies. If an old brandy contains only  1 128  of the tritium present in new brandy, then how long ago (in yr) was it produced?

Q: A sample of wood from an Egyptian mummy case taken from an archaeological site is subjected to…

A: Given :A∘=16.3 d/m.gA=10.41 d/min.g

Q: A drug tagged with 4399Tc (half - life = 6.05 h) is prepared for a patient. If the original activity…

A: Formula to calculate the activity of the drug after 2.0 h is,

Q: Two radioactive sources M and N, have half-lives of 4.0 hours and 6.2 hours, respectively. The…

A:

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: A small region of a cancer patient’s brain is exposed for 24.0 min to 475 Bq of radioactivity from…

A: Given data: Time t=24 min =1440seconds Emission rate =475 Bq Amount of dose =1.858g=0.001 Energy E=…

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: The following data are obtained from sources A and B of the same isotope: Timing Period Source A +…

A: In this question we have to find the ratio of activity and the percent standard deviation. Please…

Q: 2. Calculate the activity due to "C in 1.00 kg of carbon found in a living organism. Express the…

A: The number of carbon nuclei in the sample can be found using the equation,

Q: A gamma scan showing the active volume of a patient’s lungs can be created by having a patient…

A: Given: The dose is 3.0 mSv. The mass of lung is 1.2 kg.

Q: Tritium (half-life = 12.3 yr) is used to verify the age of expensive brandies. If an old brandy…

A: Given: The half-life of tritium = 12.3 years Amount of tritium present in the old brand =1256

Q: A beam of 168 MeV nitrogen nuclei is used for radiotherapy. If this beam delivers a 2.00 Sv dose to…

A: Given: Energy of beam (E) = 168 MeV. Of nitrogen nuclie. Relative biological effectiveness (R.B.E.)…

Q: A radioactive isotope has an activity of 9.34×104 Bq initially. After 3.10 hours the activity is…

A:

Q: A radiation worker stands 35 cm away from a radioactive source of 30 mCi (11.1 GBq) 99mTc (?? for…

A: The equation of exposure rate is given as,

Q: A radiation worker stands 35 cm away from a radioactive source of 30 mCi (11.1 GBq) 9mTc (k, for…

A: The exposure rate is given by

Q: A student carries out a radioactive decay experiment. She measures the activity of a source as a…

A: Given: The activity of the substance is given as below. Rt=714e-0.41×t…

Q: You have an istope with a decay constant of 2.48x10-³s-¹. What is the half life of isotope?

A:

Q: Because of the 1986 explosion and fire in a reactor at theChernobyl nuclear power plant in northern…

A: Assume that the area is 1m2. Here, 1×1016Bq is spread uniformly over an area of 2.6×105km2, in 1m2…

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: Many medical PET scans use the isotope 18F, which has a half-life of 1.8 h. A sample prepared at…

A: To determine: The activity of the medical PET scans when the patient is injected.

Q: To date the age of the oldest materi als, scientists would normally tum to the radioactivity of a.…

A:

Q: There is more than one isotope of natural uranium. If a researcher isolates 1.00 mg of the…

A: mass = 1 mg  = 0.001 g Activity = 80Bqhalf life ??

Q: Suppose a radioactive nucleus has a half-life of 2 min. and suppose the counting rate at time t = 0…

A: Since you have posted a question with a multiple sub parts, we will solve first three sub - parts…

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

A:

Q: 10.)A radioisotope has a half-life of 5.0 days. The activity of a radioisotope sample prepared ten…

A: half life (t1/2) = 5 days Activity (A) = 6400 Bq time = 10 days

Q: a sample containing l-131 has an activity of 6.4x10^8 Bq.h how many days later will the sample have…

A:

Q: 85Sr is a short-lived (half-life 65 days) isotope used in bone scans. A typical patient receives a…

A: The activity of 85Sr isotope at the time, when it is given to a patient, A0 = 0.10 mCi The half-life…

Q: What fraction of radioactive nucleus sample survive after two half-lives?

A: Half-life is the time taken by the radioactive element to become the half of the original amount as…

Q: A 228Th source is labeled 1.50 mCi, but its present activity is found to be 3.47 ✕ 106 Bq.   (a)What…

A:

Q: Tritium (half-life = 12.3 yr) is used to verify the age of expensive brandies. If an old brandy…

A: The amount remaining is equal to the original amount times 1/2 raised to the of half-lives that have…

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: A radiation worker stands 50 cm away from a radioactive source of 25 mCi 57Co. Calculate the…

A:

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: 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: A certain isotope has a half-life of 5.9 h and an atomic mass of 95.98 u. What will the activity in…

A:

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

A: The expression for the half life is,

Q: A drug tagged with Tc (half-life = 6.05 h) is prepared for a patient. If the original activity of…

A: GivenHalf life (T1/2)=6.05 hActivity of sample (A0)=1.5×104   Bq

Q: iodine 131 has a half life of 8.04 days if you start with a radioactivr I 131 sample having an…

A: Half life of I-131 isotope = 8.04 days Initial activity (Ao) = 40 micro Ci Final activity (A) = 4…

Q: A 5000-Ci 60Co source used for cancer therapy is considered too weak to be useful when its activity…

A:

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

A:

Q: An iodine isotope with a first order nuclear decay rate has a half life of 8 days. (time for half…

A:

Q: The body of a stone-age man was found in a glacier in 1997. The body was dated using radiocarbon…

A: Given   Half period , t(1/2) = 5840 years  Initial activity , Ro = 0.25 Bq  Final activity , R =…

Q: An investigator collects a sample of a radioactive isotope with an activity of 370,000 Bq. 48 hours…

A: Given data The initial activity is Ro=370000 Bq. The final activity is Rt=120000 Bq. The time is…

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.