1) Data:
<span>initial decay rate, No =16,800 disintegrations/min
final decay rate, Nf = 10,860 disintegrations/min
t = 28.0 days
t half-life =?
2) Formulas
Radioactive disintegration =>
Nt = No * e ^ (-kt)
t half-life = ln (2) / k
3) Solution
From Nt = No * e^ (-kt) =>
Nt / No = e ^ (-kt)
=> -kt = ln (Nt / No)
=> kt = ln (No/Nt)
=> k = ln (No / Nt) / t
=> k = ln (16,800 / 10,860) / 28 days = 0.01558 days^ -1
From t half-life = ln(2) / k
t half-life = ln(2) / (0.01558 days^-1) = 44.5 days.
Answer: 44.5 days.
</span>
Hello,
Here is your answer:
The proper answer to this question is "Deforestation".
Here is how:
The see when a Earth quake hits it destroys ecosystem and ecosystems are habitats because of how hard a earth quake hits it destroys home of animals and land that is very hard to repair which causes deforestation.
Your answer is deforestation.<span>
If you need anymore help feel free to ask me!
Hope this helps!</span>
Explanation:
Pressure and depth have a directly proportional relationship. This is due to the greater column of water that pushes down on an object submersed.. so the deeper the liquid level the higher the pressure of the liquid.