Two joints would never come together in a normal body. Two bones come together in a joint.
The end
vanishing point
can deep water waves and shallow water waves exist at the same point offshore?
earthquakes are caused by the movement of tectonic plates, volcanic eruptions or fault lines. earthquakes have what's called an epicenter, or the point at which it starts. From there, there are a series of three waves that erupt. P, S and surface waves. P waves are twice as fast as s waves and are useful in detecting earth quakes before the third waev arrives. P waves come first, then s, and finally, the surface or land waves come. These are the ones than destroy the ground in an actual wave like movement. Land waves are very slow, that's why it's useful in detecting the p waves, then an area can be evaucuated before the land waves come.
The point where sound waves come together (foci).
Interference
Square waves are waves that come together and crash into a "cross sea" making them look square
The epicenter is where the waves first hit the surface, the 'focus' is the point where the waves come from initially.
The different types of seismic waves are alike because all three waves come to the surface at one point. Also because they come after earthquakes.
For a point in space (or from a distant light object), spherical waves are emitted. From a point source on the surface of a liquid, circular waves will come out. In both cases the source will be the focus of the emitted waves.
Two joints would never come together in a normal body. Two bones come together in a joint.
An illusion. Parallel lines, by their nature can never come together.
Unite, Reunion, Unificaiton.. just somethings i can think of. :) Hope i helped..a little.
Pyramid
equilibrium
It is at the vertex of which the plural is vertices