The current in a wire is 0.72 a. calculate the charge that passes through the wire at: a) 7 mins b) 4 seconds

Asample of silver (with work function ? = 4.52 ev) is exposed to an ultraviolet light source (? = 200 nm), which results in the ejection of photoelectrons. what changes will be observed if: silver is replaced with copper (? = 5.10 ev) more photoelectrons ejected no photoelectrons are emitted fewer photoelectrons ejected more energetic photoelectrons (on average) less energetic photoelectrons (on average)

What does the cell nucleus do or, how does it function?

What produces wave a)sound b) heats c)transfer of energy d)vibrations