Transverse waves include waves on a string, electromagnetic waves, and seismic S waves. These are waves in which the particles in the medium move in a direction perpendicular to the path of the wave. Transverse waves travel well in solids, but not in fluids like liquid or gas.
The answer is simple, a lot! And is there such a thing as a jointer planer. No! Each machine does a completely different surfacing operation. A jointer flattens a face or straightens and squares an edge, and a planer thicknesses wood.
A woodworking jig is a device used to control the blade of a saw or the motion of another tool that will cut or otherwise alter wood. Simple jigs can be made from wood, and they can be custom-built for specific woodworking functions; a person can also buy a prefabricated woodworking jig made from wood, plastic, or even metal.