Explain the relationship between
the brightness of
40-watt bulb and the
resistance to the
passage of electric
current.

Argon, neon, and xenon are examples of

Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?

Does heating a metal wire increase or decrease its electrical resistance? why?