Question
Hard
Solving time: 4 mins
Natural water contains a small amount of tritium . This isotope beta-decays with a half-life of 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 return he analyses the whisky and finds that it contains only per cent of the radioactivity as compared to a recently purchased bottle marked ' 8 years old'. Estimate the time of that unsuccessful attempt.
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Text solutionVerified
The activity when the bottle was manufactured
Activity after 8 years
Let the time of the mountaineering years from the present
Acitivity of the bottle found on the mountain
(Activity of the bottle manufactured 8 years before)
Comparing (1) and (2)
years.
Activity after 8 years
Let the time of the mountaineering years from the present
Acitivity of the bottle found on the mountain
(Activity of the bottle manufactured 8 years before)
Comparing (1) and (2)
years.
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Question Text | Natural water contains a small amount of tritium . This isotope beta-decays with a half-life of 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 return he analyses the whisky and finds that it contains only per cent of the radioactivity as compared to a recently purchased bottle marked ' 8 years old'. Estimate the time of that unsuccessful attempt. |
Updated On | Oct 6, 2023 |
Topic | Nuclei |
Subject | Physics |
Class | Class 12 |
Answer Type | Text solution:1 Video solution: 2 |
Upvotes | 280 |
Avg. Video Duration | 2 min |