Hello I'm a 14 year old girl who wants to talk the other one of these I made turned weird so I left

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

How does a large body of water, such as the ocean, influence climate?