Ocean surface waves are fundamentally forced by winds, but these two cross-medium fields at the interface do not necessarily have the same trends17,18, due to the complicated nonlinear wind-wave interaction and the long persistence of swells. Satellite altimeters show a global increase in ocean ...
1. Figure 2b which is a snapshot at t=0.02 shows that the fast magnetoacoustic wave has been created. For a medium where initially transverse structuring exists, the nonlinear effect due to transverse gradients in the Alfvén wave speed would create magnetoacoustic waves48. In the context of ...
Notice that for the most part changes have been minor, except for the discontinuities in the transition zone, solidity of the inner core and structure just above inner core boundary. In addition to the body waves, which propagate through the volume of the Earth, there are also surface waves,...
An interesting physical phenomenon was recently observed when a fresh-water basin is covered by a thin ice film that has properties similar to the property of a rubber membrane. Surface waves can be generated under the action of wind on the air–water in
Do they make a sound? Multimessenger astronomy Additional resources Gravitational waves are tiny ripples in the very fabric of spacetime that propagate outwards from some of the most violent and powerful events in the cosmos. Traveling through the vastness of the universe to reach us here on...
A head wave is a plane wave that is generated in a medium because of the free-surface boundary conditions. In order to properly interpret ultrasonic testing signals, it is important to know how different waves propagate inside the material and how they interact with each other. In this study...
Another numerical technique which has been used to solve a variety of acoustic wave problems is the boundary element method (BEM). In this approach, the differential equations governing a medium are written as the differential equations governing the boundaries of that medium; and thus, only the ...
Speed of Sound As with all waves, the speed of sound depends on the medium through which it is traveling. In the wave unit we learned that the speed of a wave traveling on a rope is given by: F µ v = F = tension in rope µ = mass per unit length of rope In a rope, ...
In the ocean’s interior, these instabilities are primarily caused by the breaking of internal waves—energetic oscillations free to propagate through the density-stratified ocean bulk. Providing a mechanism for dense water to slowly rise from the deep ocean1,2, internal wave-driven vertical mixing...
The gyroscopic coupling between the transverse displacement components induces rotational motions of points along the rope, as the wave propagates, with a variable speed, along the waveguide. Also, the gravity-dependent terms in (2) are proportional to the spatial derivatives of the transverse ...