Every chemical compound is unique and different from the it contains. a.
molecules
c.
elements
b.
hydrogen
d.
gas

It is really hard for me right know

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

Friction removes energy from objects in motion. which statement best describes how this works? a) friction transforms ke into thermal energy b) friction transfers thermal energy to ke c) friction transforms te into pe d) friction transforms pe into ke e) friction transfers ke into pe