Janine is learning about how waves in the ocean form and move. For a class assignment, she builds a wave machine using a glass jar, water, mineral oil, and food coloring. Which best describes how Janine's model helps her to learn about waves

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)

If 10.0 ml of the solution on the right are withdrawn from the 100 ml beaker and diluted again in a similar manner, what is the new concentration? m nacl

Your friend offers to show you an intrusive igneous rock. which of the following would you expect to see?