the forces acted by the particles on each other sum to zero (粒子的相互作用力为零)the velocity of the center of mass is initially zero(初始为零)the center of mass is at the geometric center of the system (质心位于系统的几何中心)
At one instant, the center of mass of a system of two particles is located on the x-axis at x = 2.0 m. One of the particles is at the origin. The other particle has a mass of 0.10 kg and is at rest on the x-axis at x = 8.0 m. The mass of the particle at the origin is...
In particular the spin can enter only through an additive term which is independent of the orbital quantities. If the masses of the particles are the same then the single particle Hamiltonians must be the same; this rules out the possibility of treating protons and neutrons differently in a ...
What is the center of mass in physics? The center of mass for a simple object like a square, is its geometric center (centroid). To find the center of a more complex object, the center of mass formula is needed. The formula for a system of particles is the sum of the product of ...
For confined systems of identical particles, either bosons or fermions, we argue that the parabolic nature of the confinement potential is a prerequisite for the non-dissipative character of the center of mass response to a uniform probe. For an excitation in a parabolic confining potential, the ...
Although great advancements have been made in various types of complex systems, an universal theoretical framework is required. In this paper, we introduce the concept of center of 'mass' of complex networks, where 'mass' stands for node importance or centrality in contrast to that of particle ...
Center-of-mass problem in a magnetic field: Unified treatment of charged and neutral systems The approximate constant of motion introduced previously for the description of a charged system in a homogeneous magnetic field is interpreted physically ... D Baye,M Vincke - 《Physical Review A Atomic ...
Two methods to calculate the density matrix of one-body or more-than-one-body which does not include the spurious center-of-mass excitation are presented. One is the method to calculate the density matrix for the many-body wave function of general type and the other is applicable to the ca...
self.particles_accessed=Truereturnself._particles 开发者ID:Ingwar,项目名称:amuse,代码行数:29,代码来源: ▲ # 或者: from amuse.datamodel.Particles importcenter_of_mass[as 别名]deftest5(self):print"Testing SinkParticles accrete, one particle within two sinks' radii"particles = Particles(10) ...
1.An apparatus consisting essentially of a compartment spun about a central axis to separate contained materials of different specific gravities, or to separate colloidal particles suspended in a liquid. 2.An apparatus in which humans or animals are enclosed and which is revolved to simulate the ...