美国物理教师协会
期刊
会议
图书
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...
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...
来源:[J].American Journal of Physics(IF 0.782), 2019, Vol.87 (9), pp.694-695AAPT
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.
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...
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...
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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