共查询到20条相似文献,搜索用时 60 毫秒
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提出2 0 1 3年高考浙江理综卷第2 5题的题干条件多余且错误, 原因是物理模型有误, 合理分析需要用
伯努利定理. 且从两个参考系对问题再次建立物理液滴微元模型及用中学物理知识分析及计算, 结果与用伯努利
定理得出的结果一致, 出口速度均为2 2 3 3 m / s . 并对其他文献得出几种不当解法的原因进行了分析 相似文献
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利用多种方法推导了恒速物体在发射质点过程中对质点间接做功的公式及有关结论, 探究了不同参考
系中某个力做的功、 某个物体做的功, 以及媒介物体对加速物体做的功或提供的能量的计算方法, 并对相关物理问
题从多角度进行解答 相似文献
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在赤道上空,随地球自转的高空物体和绕地球运转的卫星到达高空的同一位置时,由于物体所在的参考系并不相同,物体尽管处于同一高度,但物体受到的重力并不相等,这是由于物体的重力除了与高度有关外,还与物体是否随地球自转有关. 相似文献
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由于不同的非惯性系具有不同的加速度,导致单摆在不同的非惯性系中具有不同的振动周期,所以有必要掌握非惯性系下单摆振动周期的计算.基本的计算方法是利用非惯性系动力学方程,结合受力分析求解,但这种方法既要考虑惯性力,又需要进行力的分解,比较麻烦.本文通过引入惯性力势能,给出非惯性系机械能守恒定律,并利用机械能守恒定律对处于特定非惯性系中的单摆周期进行分析计算,得出非惯性系中单摆的振动周期不仅与单摆自身属性有关,而且与非惯性系的运动加速度或角速度有关的结论. 相似文献
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Considering the inertia of individuals in real life,we propose a modified Fermi updating rule,where the inertia of players is introduced into evolutionary prisoner's dilemma game(PDG) on square lattices.We mainly focus on how the inertia affects the cooperative behavior of the system.Interestingly,we find that the cooperation level has a nonmonotonic dependence on the inertia:with small inertia,cooperators will soon be invaded by defectors;with large inertia,players are unwilling to change their strategies and the cooperation level remains the same as the initial state;while a moderate inertia can induce the highest cooperation level.Moreover,effects of environmental noise and individual inertia are studied.Our work may be helpful in understanding the emergence and persistence of cooperation in nature and society. 相似文献
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Considering the inertia of individuals in real life, we propose a modified Fermi updating rule, where the inertia of players is introduced into evolutionary prisoner's dilemma game (PDG) on square lattices. We mainly focus on how the inertia affects the cooperative behavior of the system. Interestingly, we find that the cooperation level has a nonmonotonic dependence on the inertia: with small inertia, cooperators will soon be invaded by defectors; with large inertia, players are unwilling to change their strategies and the cooperation level remains the same as the initial state; while a moderate inertia can induce the highest cooperation level. Moreover, effects of environmental noise and individual inertia are studied. Our work may be helpful in understanding the emergence and persistence of cooperation in nature and society. 相似文献
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用气垫转盘测转动惯量的数据处理及误差分析 总被引:1,自引:0,他引:1
利用最小二乘法对气垫转盘测转动惯量的数据进行一元线性回归,分析了实验误差来源,讨论了实验数据中出现摩擦力矩为负的原因。 相似文献
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A. Weiguny 《Zeitschrift für Physik A Hadrons and Nuclei》1965,186(3):227-239
In describing a system ofN particles (e.g. nucleons) in the body-fixed coordinate system of instantaneous principal axes of inertia, in the rotation-vibration part of the Hamiltonian there occur the hydrodynamical moments of inertia. It is, however, not possible to use them as effective moments of inertia as long as the Coriolis term in the Hamiltonian does not vanish. In order to obtain a quantitative picture of the Coriolis coupling influence upon the moments of inertia, we show by means of a unitary transformation how the Coriolis coupling can be eliminated in the limiting case of a rigid body and how by such a procedure the hydrodynamical moments of inertia are transformed into the rather different moments of the rigid body. 相似文献