93 research outputs found
Induced energy polarization of the vacuum and the rotational curve for the galaxy
No full textThis is a manuscript version of an article published as: Penner, A.R. (2013). "Induced energy polarization of the vacuum and the rotational curve for the Galaxy". Canadian Journal of Physics, 91(2), 126-133. DOI: 10.1139/cjp-2012-0300
Canadian Journal of Physics is available online at: http://www.nrcresearchpress.com/journal/cjp and this article is available at: http://dx.doi.org/10.1139/cjp-2012-0300The theory of an induced energy polarized vacuum, as previously presented by the author (Penner. Can. J. Phys. 90, 315 (2012)), is used to generate a theoretical rotational curve for the Galaxy. The theoretical curve generated is found to be in good agreement with Sofue's (Publ. Astron. Soc. Jpn. 64, (2012)) compilation of observations. For the baryonic mass distribution and baryonic Tully–Fisher relationship that is used, the theoretical orbital velocity at the Sun's location is found to be (235 ± 15) km s−1. The galactic rotational velocity is then found to slowly fall from this value as it asymptotically approaches the value of (192 ± 15) km s−1.https://viuspace.viu.ca/bitstream/handle/10613/2896/Penner.CJP91.2.pdf?sequence=3Post-print versio
Gravitational anti-screening and binary galaxies
No full textThis is a pre-copyedited, author produced version of an article published as: Penner, A.R. (2017). Gravitational anti-screening and binary galaxies. Astrophysics and Space Science, 362(4), 1-10. DOI: 10.1007/s10509-017-3054-7
The final publication is available at Springer via http://dx.doi.org/10.1007/s10509-017-3054-7.Previously, in Penner (2016a, 2016b), a theory of gravitational anti-screening was shown to lead naturally to the Baryonic Tully-Fisher Relationship. In addition, it was shown to agree with the observed rotational curve of the Galaxy, the observed features in the rotational curves of other spiral galaxies, with observations of the Coma cluster, and with a geometrically flat universe. In this paper the theory will now be applied to binary galaxies. It is shown that there is a relationship between the line-of-sight velocity difference of the pair and the individual rotational velocities of the galaxies. The resulting probability function for β, defined as the ratio of the line-of-sight velocity difference to the rotational velocity of the larger galaxy of the pair, is in excellent agreement with the observations taken by multiple researchers for the case of the binaries being on radial orbits.https://viurrspace.ca/bitstream/handle/10613/5698/Penner.80.pdf?sequence=3Pre-prin
The physics of golf: The optimum loft of a driver
No full textThe impact between a clubhead and a golf ball along with the resulting flight and run of the ball after
landing is considered. The clubhead loft which results in the maximum drive distance and its
dependence on the initial clubhead speed is then determined.https://viuspace.viu.ca/bitstream/handle/10613/2821/Penner.Loft.pdf?sequence=3Copyright 2001 American Association of Physics Teachers (AIP Publishing). This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing.
The following article appeared as: Penner, A.R. (2001). "The physics of golf: The optimum loft of a driver". American Journal of Physics, 69(5), 563-568, and may be found at http://dx.doi.org/10.1119/1.134416
Suspension of a disk on a surface of water
No full textThe suspension of a disk on the surface of water by the forces of surface tension and buoyancy is considered. Both theoretical and experimental results are presented along with a discussion of the relative importance of the buoyant force.https://viuspace.viu.ca/bitstream/handle/10613/2831/Penner.Suspension.pdf?sequence=3The following article appeared as: Penner, A.R. (2000). "Suspension of a disk on a surface of water". American Journal of Physics, 68(6), 549-551, and may be found at http://dx.doi.org/10.1119/1.1949
Gravitational anti-screening as an alternative to the ΛCDM model
No full textThis is a pre-copyedited, author produced version of an article published as: Penner, A.R. (2016). Gravitational anti-screening as an alternative the ΛCDM model. Astrophysics and Space Science, 361(11), 1-5. DOI: 10.1007/s10509-016-2953-3
The final publication is available at Springer via http://dx.doi.org/10.1007/s10509-016-2953-3.Previously, in Penner (2016), a theory of gravitational anti-screening was shown to lead to the Baryonic Tully-Fisher Relationship. In addition it was shown to agree with the observed rotation curve of the Galaxy, the observed features in the rotational curves of other spiral galaxies, and with observations of the Coma cluster. In this paper, the theory is now shown to be consistent with a geometrically flat universe. Using a model of the distribution of superclusters, the overall density parameter of the universe, as determined by the theory, is Ω = 1.08 ± 0.19. In addition, the energy density which falls out from the theory has a negative pressure associated with it. This, along with a model of the evolution of superclusters, leads to an acceleration of the universal expansion without the requirement of dark energy. The theory of gravitational anti-screening therefore provides an alternative to the ΛCDM model of cosmology.https://viurrspace.ca/bitstream/handle/10613/5697/Penner.631.pdf?sequence=3Article 361Pre-print versio
The physics of golf: The convex face of a driver
No full textThe impact of the clubhead of a driver with a golf ball is modeled. The effect of the convex clubface of a driver on the flight of the golf ball is considered and the dependence of the optimum curvature of the clubface on the volume, mass, and impact speed of the clubhead is determined.https://viuspace.viu.ca/bitstream/handle/10613/2816/Penner.Convex.pdf?sequence=3The following article appeared as: Penner, A.R. (2001). "The physics of golf: The convex face of a driver". American Journal of Physics, 69(10), 1073-1081, and may be found at http://dx.doi.org/10.1119/1.138038
The physics of sliding cylinders and curling rocks
No full textThe lateral deflection of a rotating cylindrical shell sliding on one of its ends is considered and both
theoretical and experimental results are presented. The coefficient of kinetic friction between a
curling rock and an ice surface is then derived and compared with experiment. Current models of
the motion of a curling rock are discussed and an alternate hypothesis is presented.https://viuspace.viu.ca/bitstream/handle/10613/2815/Penner.Curling.pdf?sequence=3The following article appeared as: Penner, A.R. (2001). "The physics of sliding cylinders and curling rocks". American Journal of Physics, 69(3), 332-339, and may be found at http://dx.doi.org/10.1119/1.130951
A scratch-guide model for the motion of a curling rock
No full textThis is a pre-copyedited, author produced version of an article published as: Penner, A.R. (2019). A scratch-guide model for the motion of a curling rock. Tribology Letters, 67(2), 1-13. DOI: 10.1007/s11249-019-1144-0
The final publication is available at Springer via http://dx.doi.org/10.1007/s11249-019-1144-0.A model based on a scratch-guide mechanism being responsible for the curl of a curling rock is presented. The model is based on the postulate that when the asperities around the rear of the running band of a curling rock cross the scratches produced by the front of the running band, at an angle due to the rotation of the curling rock, a sideways force will be exerted on them. It is shown that such a mechanism does lead to a curl distance of the correct magnitude and one that is insensitive to angular velocity. The model is then compared to previous experimental results where it is found to be in good agreement.https://viurrspace.ca/bitstream/handle/10613/23322/PennerTL.pdf?sequence=3Article 35Pre-print versio
Reply to the comment on "A scratch-guide model for the motion of a curling rock"
No full textThis is a pre-print of an article published in Tribology Letters. The final authenticated version is available online at: http://dx.doi.org/10.1007/s11249-019-1243-y.pdf.Several issues were raised in the Comment on “A scratch-guide model for the motion of a curling rock.” A reply to these comments is provided.Article 1Pre-print versio
Gravitational anti-screening as an alternative to dark matter
No full textThis is a pre-copyedited, author produced version of an article published as: Penner, A.R. (2016). Gravitational anti-screening as an alternative to dark matter. Astrophysics and Space Science, 361(4), 1-10. DOI: 10.1007/s10509-016-2710-7
The final publication is available at Springer via http://dx.doi.org/10.1007/s10509-016-2710-7.A semiclassical model of the screening of electric charge by virtual electric dipoles, as found in electrodynamic theory, will be presented. This model is then applied to the hypothetical case of an electric force where like charges attract. The resulting anti-screening of the electric charge is found to have the same functional dependence on the field source and observation distance that is found with the Baryonic Tully-Fisher Relationship. This leads to an anti-screening model for the gravitational force which is then used to determine the theoretical rotational curve of the Galaxy and the theoretical velocity dispersions and shear values for the Coma cluster. These theoretical results are found to be in good agreement with the corresponding astronomical observations. The screening of electric charge as found in QED and the larger apparent masses of galaxies and galactic clusters therefore appears to be two sides of the same coin.Article 124Post-print versio
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