The following model is a representation of citric acid, the key substance in the so-called citric acid cycle, by which food molecules are metabolized in the body. Only the connections between atoms are shown; multiple bonds are not indicated. Complete the structure by indicating the positions of multiple bonds and lone-pair electrons (gray = C, red = O, ivory = H).
What conditions must exist in order for a force to do work on an object?
Conifer trees are found in which biome?
A copper refinery produces a copper ingot weighing 150lb150 \mathrm{lb}150lb. If the copper is drawn into wire whose diameter is 8.25 mm8.25 \mathrm{~mm}8.25 mm, how many feet of copper can be obtained from the ingot? The density of copper is 8.94 g/cm38.94 \mathrm{~g} / \mathrm{cm}^38.94 g/cm3. (Assume that the wire is a cylinder whose volume is V=πr2hV=\pi r^2 hV=πr2h, where rrr is its radius and hhh is its height or length.)
