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.
extrusive landforms are volcanic masses that appear above the earths surface. In short they are landforms formed by volcanic activities outside the earth's crust. Eg: Lava Planes and Basalt Plateaux such as snake basin,USA and the Deccan Plateau in India.xtrusive igneous rock is one of two different types of igneous rocks. The other kind is intrusive igneous rock. Intrusive igneous rock is formed when magma in Earth's lithosp â¦ here cools and hardens. Extrusive igneous rock is formed when lava on Earth's surface cools and hardens.