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A traveling wave is a type of wave in which energy is transmitted in a definite direction and with a definite speed.
All water and air flowing in a definite direction is called a current.
Solid
gas
Solid
A transverse wave would cause the displacement to be perpendicular to the direction. They will also be moving at a constant speed.
momma
Definite shape and volume
a river not yo moma
A ray does have a definite beginning, it's point, but it goes on forever in the other direction, which is symbolized by an arrow.
Compound
Evolutionary Theory