Basically, a passive radiator is a reactionary device as the name suggests. When a driver (such as a subwoofer) is mounted to a sealed speaker box (enclosure), the physical forward/back movement of the speaker affects the internal air pressure of the enclosure.
The 3 landforms created by wave erosion sometimes called coastal  erosion are headlands and bays, cliffs and wave cut platforms and  finally caves, arches, stacks and stumps â¦ . Wave erosion is the  wearing away of land and the removal of beach by wave currents.
ArÃªte. ArÃªte landforms have 3 main characteristics: Sharp ridge of rock; On a mountain; Formed by glaciers; Example of an ArÃªte Landform: Garden Wall, Glacier National Park, Montana, USA. What is an ArÃªte Landform? An arÃªte is a sharp ridge of rock that is formed between glacially created valleys.