A hexahedron (plural: hexahedra) is any polyhedron with six faces. A cube, for example, is a regular hexahedron with all its faces square, and three squares around each vertex. There are seven topologically distinct convex hexahedra, one of which exists in two mirror image forms.
Some bacteria that can help the environment are called decomposers. They are nature's recyclers! They return basic chemicals to the environment for living things to reuse! For example, the leaves of many trees die in the Autumn and drop to the ground.ome bacteria that can help the environment are called decomposers. They are nature's recyclers! They return basic chemicals to the environment for living things to reuse! For example, the leaves of many trees die in the Autumn and drop to the ground.
Right now, the fuel cell generates only enough current to directly power a small light or calculator. But Lovley says bacterial fuel cells are great for charging up batteries, which can then power any number of devices.Lovley: This is more a local power sourceâit's not the type of thing where we're going to be adding substantial amounts of power to the power grid.his type of bacterial battery has been tinkered with before. What's important about this experiment is the efficiency of the system. These bacteria converted 80% of the available electrons on the sugars into electricity. Previous models have shown efficiency rates no higher than 50% and sometimes lower than 10%.