What did Heraclitus mean when he said, “You never see the same river twice”? A. Individual perception is always changing.
B. Water is in all solids found in the universe.
C. Once something is seen, it cannot be unseen.
D. A river will change from one time you see it to the next.

With i really need the correct answer!

How to tell if a molecule is polar or nonpolar with electronegativity

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?