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:
Caucasus Mountain Range or Caucasus Mountains is between the black and caspian seas.
Explanation:
This mountain is a great barrier that extends for 750 miles and its tops exceed 4500 meters. It is located <u>between the Black Sea and the Caspian Sea.
</u>
It has two mountain ranges: the Great Caucasus, which is the largest mountain range and extends for 1200 km, and the Lesser Caucasus which is 600 km long.
This great mountain range was <u>created by the clash between the Arab plate and the Eurasian plate</u> approximately 28 million years ago. Due to the constant movement of plates,<u> it is a region prone to continuous strong earthquakes</u> although it does not have volcanic activity despite the existence of some stratovolcanoes.
Can you post the statements in the comments please lol
love to help but this is incomplete! :)
The answer is Asia, The Bering Strait.
