Answer: Isotope A was measured at day 24, Isotope B was measured at day 6, and Isotope C was measured at day 10.
Explanation:
The half-life time is defined as the time needed for the radioactive isotope to decay to the half of its initial concentration.
- Isotope A: its starting weight 95 g and its ending measured weight is 5.9.
95 → 47.5 (half-life 1) → 23.75 (half-life 2) → 11.875 (half-life 3) → 5.9 (half-life 4).
It needs 4 half-lives to decay from 95 to 5.9.
half-life time of isotope A = 6 days.
the time taken to measure isotope A = (4 x 6 days) = 24 days.
- Isotope B: its starting weight 20 g and its ending measured weight is 2.5.
20 → 10 (half-life 1) → 5 (half-life 2) → 2.5 (half-life 3).
It needs 3 half-lives to decay from 20 to 2.5.
half-life time of isotope B = 2 days.
the time taken to measure isotope B = (3 x 2 days) = 6 days.
- Isotope C: its starting weight 45 g and its ending measured weight is 22.5.
45 → 22.5 (half-life 1)
It needs 1 half-life to decay from 45 to 22.5.
half-life time of isotope C = 10 days.
the time taken to measure isotope C = (1 x 10 days) = 10 days.
Answer:
help with mine ill help with yours
Answer:
Explanation:
{\displaystyle {}^{n}x}{}^{n}x, for n = 2, 3, 4, …, showing convergence to the infinitely iterated exponential between the two dots
In mathematics, tetration (or hyper-4) is an operation based on iterated, or repeated, exponentiation. It is the next hyperoperation after exponentiation, but before pentation. The word was coined by Reuben Louis Goodstein from tetra- (four) and iteration.
Under the definition as repeated exponentiation, the notation {\displaystyle {^{n}a}}{\displaystyle {^{n}a}} means {\displaystyle {a^{a^{\cdot ^{\cdot ^{a}}}}}}{\displaystyle {a^{a^{\cdot ^{\cdot ^{a}}}}}}, where n copies of a are iterated via exponentiation, right-to-left, I.e. the application of exponentiation {\displaystyle n-1}n-1 times. n is called the "height" of the function, while a is called the "base," analogous to exponentiation. It would be read as "the nth tetration of a".
Tetration is also defined recursively as
{\displaystyle {^{n}a}:={\begin{cases}1&{\text{if }}n=0\\a^{\left(^{(n-1)}a\right)}&{\text{if }}n>0\end{cases}}}{\displaystyle {^{n}a}:={\begin{cases}1&{\text{if }}n=0\\a^{\left(^{(n-1)}a\right)}&{\text{if }}n>0\end{cases}}},
allowing for attempts to extend tetration to non-natural numbers suc
Answer:
B
HVL is that amount of material that will reduce the original intensity to half of its value. One HVL will reduce the 100 R/minute to 50 R/minute, a second HVL will reduce the 50 R/minute to 25 R/minute
Explanation:
Answer:
Inorganic chemistry
Explanation:
Meaning: Inorganic chemistry studies substances that do not contain carbon; therefore, it studies non carbon based structure.
