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.
Three landforms created by wind are; sand dunes, yardangs (half-teardrop shaped formations hill sized, and deflation hollows (wind swept depressions.
Landforms Created By Wave Erosion. The softer rock along the coastline erodes first. Sometimes waves can erode a hollow area called a sea cave. Over time waves can also erode the base of a cliff so much that it makes the rock above it collapse, creating a wave cut cliff.Another landform that is created by waves is called a sea arch.A sea arch forms when waves erode a layer of soft rock that is underneath a layer of hard rock.ometimes waves can erode a hollow area called a sea cave. Over time waves can also erode the base of a cliff so much that it makes the rock above it collapse, creating a wave cut cliff. Another landform that is created by waves is called a sea arch.