When a person strikes and lights a match, potential energy in the match is transformed into which types of energy? electrical and thermal
thermal and radiant
radiant and nuclear
nuclear and kinetic

In a classical model of the hydrogen atom, the electron moves around the proton in a circular orbit of radius 0.053 nm. what is the electron's orbital frequency? what is the effective current of the electron?

The direction of the current in an alternating current circuit remains constant. is direct. changes repeatedly. changes randomly.

If frequency goes up, what happens to wavelength? does it get shorter or longer?