Which of the above pictures (A-H) represents atom of an element? 2, Which of the above pictures represents molecules of an element? 3, Which picture displays a mixture of atoms? 4. picture displays a mixture of atoms and compounds? 5. Which picture displays molecules of a compound? 6. EXTENSION: which picture shows atoms of an element which is a solid?

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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.

explanation: