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They are both concepts of a branch of mathematics that is called statistics.
Because it deals with mechanical issues.
Psephology
It is calculated by using a branch of Newtonian mathematics called orbital mechanics.
Physics.Simple machines include the fulcrum and lever, wheel and axle, pulley, and inclined plane. The principles involved in their operation are understood in a branch of physics called mechanics, or sometimes, classical mechanics.
If two or more PMSAs are geographically linked, they are referred to as CMSAs.
This is a person who is mainly studying a branch of physics called Astrophysics. They deal with an analytically model and numerical simulation at work. Due to this being a large branch of physics an astrophysicist will dip their hands in the fields of aerospace engineering, mechanics, electromagnetism, statistical mechanics, thermodynamics, quantum mechanics, relativity, nuclear and particle physics, and atomic and molecular physics To explain it in an easy statement its a person who studies the physics of stellar phenomena. Note: 'Astronomer' and 'Astrophysicist' can be used, pretty much, interchangeably.
it is operated mechanically that's why it called so
It is also called wave mechanics because quantum mechanics governed by Schrodinger's wave equation in it's wave-formulation.
In the microworld the study of motion is called mechanics or classical mechanics. The study of the motion of particles in the microworld of atoms and nuclei is called quantum mechanics.
In physics this is called mechanics.Quantum mechanics is the branch of physics that deals with the motion of particles by their wave properties at the atomic and subatomic levels.