Howdy! can be replied to with just a nod and a smile. It simply means Hi! in Texan - not How are you doing?. Or you might reply, Hey Y'all Doon? if you want to engage in proper Texan interactions. Replying in proper English, well pronounced, with each syllable clearly spoken, is HIGHLY discouraged.
The crest of a wave is the point of maximum positive displacement, or upward movement, away from equilibrium, or an undisturbed state. The opposite of crest is trough, which is the point of the greatest negative, downward displacement.
The highest part of the wave is called the wave crest, and the lowest part of the wave is the wave trough. Waves travel together, and this movement of waves as a group is known as a wave train. There are different types of ocean waves. Wind waves are waves that are created by wind.