Time distance decay
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All of the above are correct
Answer:
Other countries financial issues were hurting their economy
Explanation:
The European Union is an amalgamation of different countries under one body in-order to promote unique economic and developmental goals. And also, it ensure single and free movement of goods and people without restrictions whatsoever.
<em>For the British, their leaving the European Union (commonly called Brexit) is as a result of the financial issues of other smaller countries hurting their economy. The wanted to be in charge of their economy going by the fact that, their currency is far better and valuable than the Euro.</em>
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.
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Answer:
Topographic maps are map that show elevation through lines. When a slop is steep, the lines on a topographic map will be closer together.
Explanation:
