13. "The business of America is business.” — President Calvin Coolidge. By making this statement, President Coolidge was expressing his support for
a. higher taxes on corporations.
b. banking regulations.
c. democratic socialism.
d. laissez-faire capitalism.

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)

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.

Need ! asap will mark 10 pts using the room temperature line (orange line) and your periodic table, make lists that identify the state of matter (gas, liquid, or solid) in which each element you plotted exists at room temperature. explain your answers