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.
1 To understand the landforms created by coastal erosion and deposition. 2  The waves attack the base of the cliff through the processes of abrasion, corrosion, hydraulic action and attrition. 3  Over time the cliff will be undercut and a wave-cut notch is formed.4  Eventually the cliff becomes unstable and collapses. To understand the landforms created by coastal erosion and deposition. 2  Learning Objectives. 3  To understand the landforms created by coastal erosion and deposition. 4  The waves attack the base of the cliff through the processes of abrasion, corrosion, hydraulic action and attrition.