The radioactivity of a given sample of whisky due to tritium (half life `12.3` years) was found to be only `3 %` of that measured in a recently purchased bottle marked `''7` years old''. The sample must have been prepared about.
Natural water contains a small amount of tritium ( _1^3H) . This isotope beta -decays with a half-life of 12.5 years.A mountaineer while climbing towards a difficult peak finds debris of some earlier unsuccessful attempt.Among other things he finds a sealed bottle of whisky.On returm he analyses the whisky and finds that it contains only 1.5 per cent of hte _1^3H radioactivity as compared to a recently purchased bottle marked '8 years old' .Estimate the time of that unsuccessful attempt.
Tritium has a half life of 12.5 years against beta decay. What fraction of a sample of pure tritium will remain undecayed after 25 years?
Tritium has a half-life of 12.5 years. What fraction of the sample will remain undecayed after 50 years?
The radioactivity due to C-14 isotope (half-life = 6000 years) of a sample of wood form an ancient tomb was found to be nearly half that of fresh wood. The bomb is there for about
A bottle of red wine is thought to have been sealed about 5 years ago. The wine containa a number of different kinds of atoms, incluing carbon, oxygen,and hydrogen. Each of these has a radioactive isotope. The radiaoctive isotope of carbon is the familiar ._6^(14)C with a half-life of 5730 years . The radioactive isotope of oxygen is. ._(8)^(15)O and has a half-life of 122.2 s . The radioactive isotope of hydrogen ._1^(3)H and is called tritium, its half-life is 12.33 years . The activity of each of these isotopes is known at the time the bottle was sealed. However, only one of the isotopes is useful for determining the age of the wine accurately. Which is it?
A radioactive isotope has a half life of T years. It radius to 3.125% of its original value in
