How do we ‘charge’ a pith ball? How do we ‘neutralize’ a pith ball?

In a system, when potential energy decreases, then entropy also decreases. true false

Using a caesar cypher with an offset of three characters (a -> d, b -> e, z -> c), what would be the correct cypher text for the plain text "attack at dawn"?

Which one of the following represents the reduced forms of the two major electron carriers? nadh and fadh2 nad+ and fadh2 nad+ and fad nadh and fad