The mining of phosphate on an island has stripped away soil and vegetation and forced people to import food. in your own words, suggest a method to solve this problem and explain how it would to solve human, economic, and environmental issues associated with phosphate mining.

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)

The name of the ion, s2-, is: sulfurous ion sulfide ion sulfur ion sulfate ion

What effect might melting sea ice have for people who live in coastal areas?