Answer:
The age of the rock = 2800.6 million years = 2.8 billion years.
A simple method of analysis similar to Carbon dating is used to obtain the required age of the rock. Radioactive substances decay according to first order reaction kinetics. So, plugging all the required parameters into the general equation for amount of substance left in a first order decay gives us the age of the rock.
Explanation:
Half life of Uranium-235 = 700 million years (from literature)
The decay of radioactive substances follow first order reaction kinetics.
The general equation is given as
A(t) = A₀ e⁻ᵏᵗ
A(t) = Amount of radioactive substance left after a particular time = 6.25%
A₀ = initial amount of radioactive substance = 100%
t = time that has passed since the beginning = age of the rock = ?
k = decay constant
The decay constant is related to the half life (T) through the relation,
k = (In 2)/T
k = (0.693/700) = 0.00099 /million years
A(t) = A₀ e⁻ᵏᵗ
6.25 = 100 e⁻ᵏᵗ
0.0625 = e⁻ᵏᵗ
In e⁻ᵏᵗ = In 0.0625 = -2.7726
-kt = - 2.7726
t = (2.7726/0.00099) = 2800.6 million years
t = 2.8 billion years.
Hope this Helps!!!
Answer:
melting
Explanation:
it melted and humans kept walking
The correct answer is - A. The Hague, Netherlands.
The Balkan Wars after the fall of Yugoslavia were devastating for the people and the countries once part of this strong unified nation. After the nationalistic parties managed to gain control in their countries, they started to fight with their ''old enemies'' for gaining more territory, creating ethnically clean areas, and committing genocides in as well.
Most of the crimes were done against the Muslim Bosnians, Serbians, Croatians, Albanians, but also the Serbians, Croatians, and Albanians were the ones that were making genocide, so they were all intermingled, and the ordinary people suffered the most.
Most of the war criminals were having trials in Hague, Netherlands, with the Serbians and Croatians dominating, but interestingly enough, there were no charges against Albanian war criminals from Kosovo that also were making genocide on innocent population.
D. I’m pretty sure
Correct me if I’m wrong
