美国物理教师协会
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Gravity discharge vessel revisited: An explicit Lambert W function solution
作者：Rafael M. Digilov
来源：[J].American Journal of Physics(IF 0.782), 2017, Vol.85 (7), pp.510-514AAPT
摘要：Based on the generalized Poiseuille equation modified by a kinetic energy correction, an explicit solution for the time evolution of a liquid column draining under gravity through an exit capillary tube is derived in terms of the Lambert W function. In contrast to the conventiona...
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    Oblique collisions of baseballs and softballs with a bat
    作者：Jeffrey R. Kensrud
    来源：[J].American Journal of Physics(IF 0.782), 2017, Vol.85 (7), pp.503-509AAPT
    摘要：Experiments are done by colliding a swinging bat with a stationary baseball or softball. Each collision was recorded with high-speed cameras from which the post-impact speed, launch angle, and spin of the ball could be determined. Initial bat speeds were in the range 63–88 m...
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      Meshfree computation of electrostatics and related boundary value problems
      作者：J. Wang , Y. Hao
      来源：[J].American Journal of Physics(IF 0.782), 2017, Vol.85 (7), pp.542-549AAPT
      摘要：We discuss a meshfree method for solving boundary value problems in physics. The method uses random data interpolation and radial basis functions that depend on the distance, instead of the usual basis functions that depend on the position. As an example, we apply this method to ...
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        Brownian Ratchets: From Statistical Physics to Bio and Nano-Motors
        作者：Harvey S. Leff
        来源：[J].American Journal of Physics(IF 0.782), 2017, Vol.85 (7), pp.557-558AAPT
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          Doomed to Cooperate: How American and Russian Scientists Joined Forces to Avert Some of the Greatest Post-Cold War Dangers
          作者：Cameron Reed
          来源：[J].American Journal of Physics(IF 0.782), 2017, Vol.85 (7), pp.558-559AAPT
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            Resource Letter OSE-1: Observing Solar Eclipses
            作者：Jay M. Pasachoff
            来源：[J].American Journal of Physics(IF 0.782), 2017, Vol.85 (7), pp.485-494AAPT
            摘要：This Resource Letter provides a guide to the available literature, listing selectedbooks, articles, and online resources about scientific, cultural, and practical issuesrelated to observing solar eclipses. It is timely, given that a total solar eclipse will cross thecontinental U...
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              Low-cost nonlinear optics experiment for undergraduate instructional laboratory and lecture demonstration
              作者：Rozane de F. Turchiello
              来源：[J].American Journal of Physics(IF 0.782), 2017, Vol.85 (7), pp.522-528AAPT
              摘要：This paper presents a simple and affordable experiment on the thermal lens effect, suitable for an undergraduate educational laboratory or as a tabletop demonstration in a lecture on nonlinear optics. Such an experiment exploits the formation of a lens in an absorbing medium illu...
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                Magnetic cannon: The physics of the Gauss rifle
                作者：Arsène Chemin , Pauline Besserve , Aude Caussarieu ...
                来源：[J].American Journal of Physics(IF 0.782), 2017, Vol.85 (7), pp.495-502AAPT
                摘要：The magnetic cannon is a simple device that converts magnetic energy into kinetic energy. When a steel ball with low initial velocity impacts a chain consisting of a magnet followed by addition steel balls, the last ball in the chain gets ejected at a much larger velocity. The an...
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                  Demonstration of fundamental statistics by studying timing of electronics signals in a physics-based laboratory
                  作者：Shaun E. Beach , Thomas M. Semkow
                  来源：[J].American Journal of Physics(IF 0.782), 2017, Vol.85 (7), pp.515-521AAPT
                  摘要：We have developed accessible methods to demonstrate fundamental statistics in several phenomena, in the context of teaching electronic signal processing in a physics-based college-level curriculum. A relationship between the exponential time-interval distribution and Poisson coun...
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                    Elementary example of energy and momentum of an extended physical system in special relativity
                    作者：Kamil Serafin
                    来源：[J].American Journal of Physics(IF 0.782), 2017, Vol.85 (7), pp.529-541AAPT
                    摘要：An instructive paradox concerning the classical description of energy and momentum of extended physical systems in special relativity theory is explained using an elementary example of two point-like massive bodies rotating on a circle in their center-of-mass frame of reference, ...
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