If a coin dealer offered to sell you a 24k gold coin at an exceptionally good price, what would you do as a first estimate to ensure that the coin is 24k?

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)

Identify a specific example for each type of technology

According to the tide table below what time of day will the highest tide occur? (2 pt) the highest tide will occur at