We know the ratio of circumference to the diameter of a circle is pi= 3.14... This ratio pi is applicable to a electron circling around a nucleus as well as to the planets revolving around the sun. This mathematical number 3.14.. is a pure constant which always remains true.
If there are minimum 58 persons in a room, two persons will definitely have same birthday(not birth date) according to the probability theory. This is also a proven truth.
The tangent of angle 45 degree is 1. That is, in a right angled triangle of angle 45 degree, two sides will be equal.
Tan 45 = 1= opposite side /adjacent side
or opposite side = adjacent side.
This can be applied to a triangle drawn on a paper or to the plane taking off at 45 degree angle.
The mathematical facts like given above are always holds good for any persons, anywhere and anytime.
Now let us consider some physics facts. The acceleration due to gravity is 9.8 m/sec^2 on the surface of the earth. But once we leave the earth, it does not hold good.
The mass of electron and proton are said to be constants. But when these particles travels at the speed of light, the constancy collapses.
Scientists now believe that physics constants may change overtime and space.
So,
diamonds may not be for ever.
But
Mathematics is really for ever.
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