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Anxiety and the Equation: Understanding Boltzmann's Entropy
作者：Kannan Jagannathan
来源：[J].American Journal of Physics(IF 0.782), 2019, Vol.87 (9), pp.765-765AAPT
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    Student's Guide to Analytical Mechanics
    作者：Craig F. Bohren
    来源：[J].American Journal of Physics(IF 0.782), 2019, Vol.87 (9), pp.766-767AAPT
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      Rattlebacks for the rest of us
      作者：Simon Jones
      来源：[J].American Journal of Physics(IF 0.782), 2019, Vol.87 (9), pp.699-713AAPT
      摘要：Rattlebacks are semi-ellipsoidal tops that have a preferred direction of spin (i.e., aspin-bias). If spun in one direction, the rattleback will exhibit seemingly stable rotarymotion. If spun in the other direction, the rattleback will being to wobble andsubsequently reverse its s...
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        Determination of aerodynamic drag coefficients using a drop test with awireless accelerometer and its application to model rockets
        作者：Simon Pettersson Fors , Carl Nord
        来源：[J].American Journal of Physics(IF 0.782), 2019, Vol.87 (9), pp.714-719AAPT
        摘要：The use of drag coefficients to quantify the drag force on objects moving through air isa key concept in aerodynamics. However, gaining access to a wind tunnel, theconventionally used apparatus with which to measure drag coefficients, can be difficultfor students and educators at...
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          Calling all physicists
          来源：[J].American Journal of Physics(IF 0.782), 2019, Vol.87 (9), pp.694-695AAPT
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            Calculating fissility without Legendre polynomials: A walk in the woods
            作者：J. M. Pearson
            来源：[J].American Journal of Physics(IF 0.782), 2019, Vol.87 (9), pp.739-744AAPT
            摘要：The original estimate of the fissility of very heavy nuclei made by Meitner and Frisch can be derived without resorting to Rayleigh's theory of vibrating liquid drops and Legendre polynomials. A simple expression, familiar from the theory of the Wilson cloud chamber, suffices.
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              Ocean wave energy, solar radiation, and characteristic times on the back of a Purcell envelope
              作者：Yoav Green , Emil J. Millet , James P. Butler
              来源：[J].American Journal of Physics(IF 0.782), 2019, Vol.87 (9), pp.693-693AAPT
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                A computer model of classical rolling friction
                作者：Robert Knop
                来源：[J].American Journal of Physics(IF 0.782), 2019, Vol.87 (9), pp.720-728AAPT
                摘要：A numerical model of a wheel consists of a series of particles evenly spaced around the rim of the wheel, each connected with both neighboring particles by a damped spring. In the simulation, the wheel rolls along the ground, allowing determination of position, velocity, deformat...
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                  Illustrations of Maxwell's term and the four conservation laws of electromagnetism
                  作者：Timothy H. Boyer
                  来源：[J].American Journal of Physics(IF 0.782), 2019, Vol.87 (9), pp.729-738AAPT
                  摘要：We illustrate the use of Maxwell's term in Ampere's law and also the conservation laws of electromagnetic theory. First, we outline the conservation laws for energy and linear momentum which often appear in textbooks of electromagnetism, and then we show how these conservation la...
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                    Reciprocity principle and relative accelerations in the theory of relativity
                    作者：Reza Rashidi , Fatemeh Ahmadi
                    来源：[J].American Journal of Physics(IF 0.782), 2019, Vol.87 (9), pp.758-762AAPT
                    摘要：It is proved that in the theory of relativity, the magnitudes of the relative accelerations of two observers with respect to each other can be unequal. The breaking of a reciprocal relationship between the accelerations is a property of special relativity, which seems not to have...
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