The Earth has spheres that are constantly interacting. Which of the following is the best example of the geosphere interacting with the biosphere? A. Volcanic ash provides nutrients in the soil for plants. B. A strain of bacteria is able to live deep in an ocean. C. Some land mammals are dependent on ice formations. D. Strong winds carry pollen across large fields to flowers.

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35. a insulated cylinder of solid gold (k 310 kw/m-k) of radius v2 m and height 5 m is heated at one end until the temperature at each point in the cylinder is given by w(r, y, z) (30 z2)(2-(r2+ y2). determine the rate of heat flow across each horizontal disk given by z 1, z 2, and z 3, identifying which has the greatest rate of heat flow across it.

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