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!!!
All of the states of the USA are north of the equator.
So are all the states of Mexico.
Explanation:
Coriolis force -
It helps to determine the turn of the wind to the right in the Northern Hemisphere due to the rotation of the Earth .
This effect does not impact the speed of the wind , it only affect the direction of the wind .
<u>The impact of the Coriolis force of the wind direction is as follows -</u>
From the north pole , the earth rotates at higher speed in the counter - clockwise direction , then the object will appear to deflect to the right of its intended path , due to the Earth's rotation .
Answer:
Shillong is in a hilly area and the hills trap the monsoon winds, so that Shillong becomes rainier than Kolkata.
Explanation:
