A longitudinal wave causes the particles of a medium to move parallel to the direction of the wave.Figure 15-2b shows a longitudinal wave .Note that the motion of the spring is parallel to the direction in which the wave is moving .Thus the difference between transverse and longitudinal ...
英语翻译A longitudinal wave causes the particles of a medium to move parallel to the direction of the wave.Figure 15-2b shows a longitudinal wave .Note that the motion of the spring is parallel to the direction in which the wave is moving .Thus t
Active colloids are a class of microparticles that ‘swim’ through fluids by breaking the symmetry of the force distribution on their surfaces. Our ability to direct these particles along complex trajectories in three-dimensional (3D) space requires str
If the velocity changes only in magnitude, that is, if the force is parallel to the velocity, then (9.3)dpdt=m(1−υ2c2)12dvdt. We see that the ratio of force to acceleration is different in the two cases. The energy E of the particle is defined as the quantity† E=p·v−...
In the design that has been adopted, the electric field is parallel to the axis of the tank. Most of these accelerators operate at frequencies of about 200 MHz—lower than the frequencies employed in linear electron accelerators, owing to the lower velocity of the heavier protons. During the ...
interaction with an electromagnetic plane wave plus a static magnetic field parallel to the direction of propagation of the electromagnetic wave are analysed in the framework of Feynman's path integrals. The Green's functions are calculated by introducing the invariant =kx as a functional constraint....
(black arrows) is along the tangential component of blue arrows; thus, the moving direction reverses when the blue arrow becomes normal to the obstacle surface att1. When the blue arrow is parallel to the obstacle surface att2(i.e., the normal component of the blue arrow is not against ...
Collision theory（碰撞理论）指的是化学反应发生的前提是反应物分子之间发生碰撞，且这些碰撞必须满足一定...
Acoustofluidics, the integration of acoustics and microfluidics, is a rapidly growing research field that is addressing challenges in biology, medicine, chemistry, engineering, and physics. In particular, acoustofluidic separation of biological targets f
Quantum mechanics allows a particle to move without practical possibility of being found at the intermediate area. Here we demonstrate this spatial adiabatic passage with ultracold atoms in an optical lattice. Key to this is the existence of dark eigenstates forming a flat energy band, with ...