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Beryllium on leaf of a plant

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That being said... How "difficult" is an exercise? It depends on many factors, like what was being taught etc.
In physics exercises, we try to follow this pattern:

Level 1 - One formula (one you would find in a reference book) is enough to solve the exercise. Example exercise

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Level 3 - "Chain-computations" like on level 2, but 3+ calculations. Still, no equations, i.e. you are not forced to solve it in an algebraic manner. Example exercise

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Level 5 -
Level 6 -

Exercise

https://texercises.com/exercise/beryllium-on-leaf-of-a-plant/

Question

Solution

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The following quantities appear in the problem: Masse \(m\) / Aktivität \(A\) / molare Masse \(M\) / Stoffmenge \(n\) / Zerfallskonstante \(\lambda\) / Anzahl \(N\) /

The following formulas must be used to solve the exercise: \(A = \lambda \cdot N \quad \) \(m = nM \quad \)

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Exercise:
Beryllium- is produced in the upper atmosphere and filters down onto the Earth's surface. Formelbuch It decays with a half-life of about TO. Estimate the initial mass of isotopeBe on the leaf of a plant if it is detected to have num decays per second.

Solution:
Geg T TO T A A Gesmassmsikg The detected activity of AO means that there are N fracAlambda fracAfracln T fracT Aln fracAlam fracln AT N n fracNsscNA fracT AlnsscNA n Beryllium- isotopes present on the leaf. Because one of them has meO mass there are m N m_ fracTAln m_ N me mb approx mbS on the leaf. Alternatively you can also compute the mass by knowing the molar mass to be MO the calculation then gives: m nM fracTAln sscNA M n M m approx mS m fracT A MlnsscNA fracm_T A ln mS

Meta Information

\(\LaTeX\)-Code

Contained in these collections:

Aktivität by uz

3 | 14
Aktivität und molare Masse by TeXercises

4 | 21
Radiometrische Datierung by pw

9 | 9

Asked Quantity: Masse \(m\) in Kilogramm \(\rm kg\)

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Tags	dating, physics, radioactivity, radiodating
Content image
Difficulty	(3, default)
Points	5 (default)
Language	(English)
Type	Calculative / Quantity
Creator	uz
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