To nullify means to render ineffective. If you nullify a contract. a warranty, or even a marriage, the effect is as if the thing had never happened. In law ( which is sometimes redundant ) things are sometimes said to be null and void - that is, nothing and nothing. Another example of legal redundancy is the term cease and desist which literally means: stop and stop.
Although they are not true examples of this type of wave, the waves on the surface of water approximate _ transverse _ waves. 7. The distance between two successive wave crests (or troughs) is called the. _ wavelength _ of the wave. 8. The height of a wave crest (or depth of trough) above the original undisturbed surface is called the _ amplitude _ of the wave. 9.
When the highest part, or crest of the wave reaches a particular location, high tide occurs; low tide corresponds to the lowest part of the wave, or its trough. The difference in height between the high tide and the low tide is called the tidal range. A horizontal movement of water often accompanies the rising and falling of the tide. This is called the tidal current. The incoming tide along the coast and into the bays and estuaries is called a flood current; the outgoing tide is called an ebb current.