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.
Some are rugged and others are flat. In other words, the Earth's surface is made up of different types of landforms. Landforms are any geological feature, such as a mountain or valley. any land feature that froms the earth's surface, mountains,  valleys, plains.Landforms are also shapes that make up the surface.+ 169 others found this useful.here are many kinds of landforms. They can be locations, such as islands; terrain, such as mountains or valleys; or t â¦ hose having specific qualities caused by climate, such as deserts, swamps, and glaciers. Some landforms are created by the action of wind, water, and ice.