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  • https://ui.adsabs.harvard.edu/abs/1957AnPhy...2..525M
    Classical physics as geometry
    If classical physics be regarded as comprising gravitation, source free electromagnetism, unquantized charge, and unquantized mass of concentrations of electromagnetic field energy (geons), then classical physics can be described in terms of curved empty space, and nothing more. No changes are made in existing theory. The electromagnetic field is given by the Maxwell square root of the contracted curvature tensor of Ricci and Einstein. Maxwell's equations then reduce, as shown thirty years ago by Rainich, to a simple statement connecting the Ricci curvature and its rate of change. In contrast to unified field theories, one then secures from the standard theory of Maxwell and Einstein an already unified field theory. This purely geometrical description of electromagnetism is traced out in detail. Charge receives a natural interpretation in terms of source-free electromagnetic fields that (1) are everywhere subject to Maxwell's equations for free space but (2) are trapped in the worm holes of a space with a multiply-connected topology. Electromagnetism in such a space receives a detailed description in terms of the existing beautiful and highly developed mathematics of topology and harmonic vector fields. Elementary particles and real masses are completely excluded from discussion as belonging to the world of quantum physics.
    UI.ADSABS.HARVARD.EDU
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  • https://arxiv.org/abs/1303.1528
    I-Love-Q Relations in Neutron Stars and their Applications to Astrophysics, Gravitational Waves and Fundamental Physics
    The exterior gravitational field of a slowly-rotating neutron star can be characterized by its multipole moments, the first few being the neutron star mass, moment of inertia, and quadrupole moment to quadratic order in spin. In principle, all of these quantities depend on the neutron star's internal structure, and thus, on unknown nuclear physics at supra-nuclear energy densities. We here find relations between the moment of inertia, the Love numbers and the quadrupole moment (I-Love-Q relations) that do not depend sensitively on the neutron star's internal structure. Three important consequences derive from these I-Love-Q relations. On an observational astrophysics front, the measurement of a single member of the I-Love-Q trio would automatically provide information about the other two, even when the latter may not be observationally accessible. On a gravitational wave front, the I-Love-Q relations break the degeneracy between the quadrupole moment and the neutron-star spins in binary inspiral waveforms, allowing second-generation ground-based detectors to determine the (dimensionless) averaged spin to $mathcal{O}(10)%$, given a sufficiently large signal-to-noise ratio detection. On a fundamental physics front, the I-Love-Q relations allow for tests of General Relativity in the neutron-star strong-field that are both theory- and internal structure-independent. As an example, by combining gravitational-wave and electromagnetic observations, one may constrain dynamical Chern-Simons gravity in the future by more than 6 orders of magnitude more stringently than Solar System and table-top constraints.
    ARXIV.ORG
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  • https://www.academia.edu/Documents/in/Physics
    Physics Research Papers - Academia.edu
    View Physics Research Papers on Academia.edu for free.
    WWW.ACADEMIA.EDU
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    https://www.academia.edu/Documents/in/Physics
    Physics Research Papers - Academia.edu
    View Physics Research Papers on Academia.edu for free.
    WWW.ACADEMIA.EDU
    https://www.academia.edu/Documents/in/Physics
    Physics Research Papers - Academia.edu
    View Physics Research Papers on Academia.edu for free.
    WWW.ACADEMIA.EDU
    https://www.academia.edu/Documents/in/Physics
    Physics Research Papers - Academia.edu
    View Physics Research Papers on Academia.edu for free.
    WWW.ACADEMIA.EDU
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  • http://classics.mit.edu/Aristotle/physics.2.ii.html
    The Internet Classics Archive | Physics by Aristotle
    Physics by Aristotle, part of the Internet Classics Archive
    CLASSICS.MIT.EDU
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  • https://arxiv.org/abs/2301.12769
    Insights into the physics of neutron star interiors from pulsar glitches
    The presence of superfluid phases in the interior of a neutron star affects its dynamics, as neutrons can flow relative to the non-superfluid (normal) components of the star with little or no viscosity. A probe of superfluidity comes from pulsar glitches, sudden jumps in the observed rotational period of radio pulsars. Most models of glitches build on the idea that a superfluid component of the star is decoupled from the spin-down of the normal component, and its sudden recoupling leads to a glitch. This transition in the strength of the hydrodynamic coupling is explained in terms of quantum vortices (long-lived vortices that are naturally present in the neutron superfluid at the microscopic scale). After introducing some basic ideas, we derive (as a pedagogical exercise) the formal scheme shared by many glitch studies. Then, we apply these notions to present some recent advances and discuss how observations can help us to indirectly probe the internal physics of neutron stars.
    ARXIV.ORG
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  • https://ui.adsabs.harvard.edu/abs/2003ftpc.book..161V
    The quantum physics of chronology protection.
    This is a brief survey of the current status of Stephen Hawking's ``chronology protection conjecture''. That is: ``Why does nature abhor a time machine?'' I'll discuss a few examples of spacetimes containing ``time machines'' (closed causal curves), the sorts of peculiarities that arise, and the reactions of the physics community. While pointing out other possibilities, this article concentrates on the possibility of ``chronology protection''. As Stephen puts it: ``It seems that there is a Chronology Protection Agency which prevents the appearance of closed timelike curves and so makes the universe safe for historians.''
    UI.ADSABS.HARVARD.EDU
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  • https://arxiv.org/abs/gr-qc/0204022
    The quantum physics of chronology protection
    This is a brief survey of the current status of Stephen Hawking's ``chronology protection conjecture''. That is: ``Why does nature abhor a time machine?'' I'll discuss a few examples of spacetimes containing ``time machines'' (closed causal curves), the sorts of peculiarities that arise, and the reactions of the physics community. While pointing out other possibilities, this article concentrates on the possibility of ``chronology protection''. As Stephen puts it: ``It seems that there is a Chronology Protection Agency which prevents the appearance of closed timelike curves and so makes the universe safe for historians.''
    ARXIV.ORG
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  • .box2d.BodyDef;
    import com.badlogic.gdx.physics.box2d.FixtureDef;
    import com.badlogic.gdx.physics.box2d.PolygonShape;
    import com.badlogic.gdx.physics.box2d.*;
    import com.badlogic.gdx.*;
    import com.badlogic.gdx.*;
    import com

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  • .Raycast(ray, out hit))
    {
    if (hit.collider.gameObject == gameObject)
    {
    if (Input.GetMouseButtonDown(0))
    {
    OnClick();
    }

    if (Input.GetMouseButtonDown(1))
    {
    OnRightClick();
    }

    if (Input.GetMouseButtonDown(2))
    {
    OnMiddleClick();
    }

    break; // Stop looking for other objects hit by raycast. We only care about this one.
    }
    }

    }

    protected virtual void OnClick() { }

    protected virtual void OnRightClick() { }

    protected virtual void OnMiddleClick() { }

    } // class ClickableObject3D
    }

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  • .box2d.Body;
    import com.badlogic.gdx.physics.box2d.BodyDef;
    import com.badlogic.gdx.physics.box2d.FixtureDef;
    import com.badlogic.gdx.physics.box2d.PolygonShape;
    import com.badlogic.gdx.physics

    By: ChatGPT AI
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  • In physics, deflection is the change in an object's direction of motion due to a force acting on it. This can be caused by a variety of different forces, such as gravity, friction, or air resistance. Deflection is usually measured in terms of angles or distances. It is an important concept in fields such as mechanics and aerodynamics, where it is used to calculate the trajectory of objects moving through space.

    By: ChatGPT AI
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  • 50 Most Expected MCQs | Full Length Test | NEET Physics | NEET Toppers | Gaurav Sir
    In this session, Gaurav Gupta will be discussing the 50 Most Expected MCQs Full-Length Test for NEET Physics. Enroll here: ...
    YouTube
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  • Dr. John Mullen
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