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.
Ans: Landform is the any recognizable naturally formed surface feature of the earth. Landforms have a characteristic shape and can include such large features as plains, plateaus, mountains, valleys as well as small features such as hills, canyons and eskers.ns: Landform is the any recognizable naturally formed surface feature of the earth. Landforms have a characteristic shape and can include such large features as plains, plateaus, mountains, valleys as well as small features such as hills, canyons and eskers.