Gold, which has a mass of 19.32 g for each cubic centimeter of volume, is the most ductile metal and can be pressed into a thin leaf or drawn out into a long fiber. (a) if a sample of gold, with a mass of 33.16 g, is pressed into a leaf of 3.000 µm thickness, what is the area of the leaf? m2 (b) if, instead, the gold is drawn out into a cylindrical fiber of radius 1.000 µm, what is the length of the fiber? m

How would you place two electrons on a sphere of radius r so that the electrostatic potential energy is minimized. how would you place three electrons to solve the same problem.

In what direction does the medium move relative to the direction of the wave? explain.

Imagine that you have two balloons (or, better yet, actually inflate two balloons, if possible). create static electricity around one of the balloons by rubbing it against your hair or your sweater and then bring that balloon close to the other balloon, which has not been charged. try this with at least one other object—and for variety in the discussion, avoid using an object already described by your classmates. then, for your initial post to the discussion, answer the following questions: what happened with the two balloons?