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Archive for the ‘PHYSICS’ Category

Upper limit on the Stiffness of space-time

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stiffnessAdrian Melissinos
From the recently observed propagation of gravitational waves through space-time an upper limit can be deduced for the stiffness of space-time through which the gravitational wave propagates. The upper limit is extremely weak, implying that the stiffness of space-time is at least 14 orders of magnitude weaker than that of jello.
Read more at https://arxiv.org/pdf/1806.01133.pdf

Written by physicsgg

June 11, 2018 at 9:38 pm

Posted in PHYSICS

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Physics Needs Philosophy. Philosophy Needs Physics

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Carlo Rovelli
Contrary to claims about the irrelevance of philosophy for science, I argue that philosophy has had, and still has, far more influence on physics than is commonly assumed. I maintain that the current anti-philosophical ideology has had damaging effects on the fertility of science. I also suggest that recent important empirical results, such as the detection of the Higgs particle and gravitational waves, and the failure to detect supersymmetry where many expected to find it, question the validity of certain philosophical assumptions common among theoretical physicists, inviting us to engage in a clearer philosophical reflection on scientific method.
Read more at https://arxiv.org/ftp/arxiv/papers/1805/1805.10602.pdf

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May 29, 2018 at 9:22 pm

Toward a Neurobiological Basis for Understanding Learning in University Modeling Instruction Physics Courses

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Written by physicsgg

May 29, 2018 at 1:42 pm

Posted in BIOLOGY, PHYSICS

Investigation of Skyscraper’s Feat

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(original version with an addendum)

Costas Efthimiou
Skyscraper is a Hollywood action film directed and written by Rawson M. Thurber scheduled to be released on July 13, 2018. We present an exhaustive analysis of the feat shown in the recently released teaser poster and trailer of the film. Although the feat appears to be unrealistic at first glance, after close investigation using back-of-the-envelope calculations, it is seen to be within human capabilities.
This article is the original version of an abridged article published in Physics Education. It was written very soon after the poster and clip were released by Universal Pictures.
Read more at https://arxiv.org/pdf/1805.09643.pdf

Written by physicsgg

May 27, 2018 at 12:24 pm

Posted in EDUCATION, PHYSICS

Emergence of Benford’s Law in Classical Music

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Azar Khosravani, Constantin Rasinariu

The histograms represents the digit distribution of time
intervals for each piano key played for the 32 piano sonatas by
Beethoven vs. the theoretical (Benford) distribution

We analyzed a large selection of classical musical pieces composed by Bach, Beethoven, Mozart, Schubert and Tchaikovsky, and found a surprising connection with mathematics. For each composer, we extracted the time intervals each note was played in each piece and found that the corresponding data sets are Benford distributed. Remarkably, the logarithmic distribution is not only present for the leading digits, but for all digits.
Read more at https://arxiv.org/pdf/1805.06506.pdf

Written by physicsgg

May 27, 2018 at 6:36 am

Posted in MATHEMATICS, MUSIC, PHYSICS

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Gravitational waves without general relativity

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strainRobert C. Hilborn
This tutorial leads the reader through the details of calculating the properties of gravitational waves from orbiting binaries, such as two orbiting black holes. Using analogies with electromagnetic radiation, the tutorial presents a calculation that produces the same dependence on the masses of the orbiting objects, the orbital frequency, and the mass separation as does the linear version of General Relativity (GR). However, the calculation yields polarization, angular distributions, and overall power results that differ from those of GR. Nevertheless, the calculation produces waveforms that are very similar to the pre-binary-merger portions of the signals observed by the Laser Interferometer Gravitational-Wave Observatory (LIGO-VIRGO) collaboration. The tutorial should be easily understandable by students who have taken a standard upper-level undergraduate course in electromagnetism.

Read more at https://arxiv.org/ftp/arxiv/papers/1710/1710.04635.pdf

Written by physicsgg

October 14, 2017 at 5:57 pm

A potential shortcut to predictions

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Written by physicsgg

November 16, 2016 at 4:53 pm

Posted in MATHEMATICS, PHYSICS

A brief history of physics education in the United States

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HS physicsIn order to provide insight into current physics teaching practices and recommended reforms, we outline the history of physics education in the United States—and the accompanying pedagogical issues and debates—over the period 1860–2014. We identify key events, personalities, and issues for each of ten separate time periods, comparing and contrasting the outlooks and viewpoints of the different eras.

This discussion should help physics educators to (1) become aware of previous research in physics education and of the major efforts to transform physics instruction that have taken place in the U.S., (2) place the national reform movements of today, as well as current physics education research, in the context of past efforts, and (3) evaluate the effectiveness of various education transformation efforts of the past, so as better to determine what reform methods might have the greatest chances of success in the future…
… Read more at physicseducation.net

Written by physicsgg

May 18, 2015 at 1:13 pm

Posted in EDUCATION, PHYSICS