Sound is a mechanical vibration of a fluid, which propagates in the form of longitudinal waves thanks to the elastic deformation of this fluid. Human beings, like many animals, experience this vibration through the sense of hearing. Acoustics is the … Read More
Month: September 2020
Karl Popper’s demarcation problem
Karl Popper, as a critical rationalist, was an opponent of all forms of skepticism, conventionalism and relativism in science. A major argument of Popper is Hume’s critique of induction, arguing that induction should never be used in science. But he disagrees with the skepticism associated with Hume, nor with the support of Bacon and Newton’s pure “observation” as a starting point in the formation of theories, as there are no pure observations that do not imply certain theories. Instead, Popper proposes falsifiability as a method of scientific investigation.
DOI: 10.13140/RG.2.2.11481.36967
Classical theory of singularities
The singularities from the general relativity resulting by solving Einstein’s equations were and still are the subject of many scientific debates: Are there singularities in spacetime, or not? Big Bang was an initial singularity? If singularities exist, what is their ontology? Is the general theory of relativity a theory that has shown its limits in this case?
DOI: 10.13140/RG.2.2.22006.45124
Study of mechanics
The main principles of mechanics Principle of energy conservation For any physical object with mass, any change in its state results in the expenditure or dissipation of energy. Principle of least action The idea of the principle of least … Read More
The post Study of mechanics appeared first on SetThings.
Hooke’s claim on the law of gravity
Based on Galileo’s experiments, Newton develops the theory of gravity in his first book Philosophiæ Naturalis Principia Mathematica (“Principia“) of 1686. Immediately after, Robert Hooke accused Newton of plagiarism, claiming that he unduly assumed his “notion” of “the rule of the decrease of Gravity, being reciprocally as the squares of the distances from the Center”. But, according to Edmond Halley, Hooke agreed that “the demonstration of the curves generated by it” belongs entirely to Newton.
DOI: 10.13140/RG.2.2.16867.81441