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.
These events change the surface of the Earth by creating different landforms. A landform is a term that describes the shape of a natural land feature. Landforms are created by different forces of nature. For example, mountains, oceans, valleys and deserts can be called landforms.A group of landforms in one area makes up a landscape.The view from an aeroplane or from the top of a hill gives a good picture of a landscape.or example, mountains, oceans, valleys and deserts can be called landforms. A group of landforms in one area makes up a landscape. The view from an aeroplane or from the top of a hill gives a good picture of a landscape.