Calculate the frequency of 8.0 meters long and 345 m/s

Which best represents the law of conservation of mass ?

The frequency of the fundamental of the guitar string is 320 hz. at what speed v do waves move along that string?

Which of the following is part of the explanation or description of electromagnetic waves? (select all that apply) a. electrically charged molecules in a medium transfer their energy to nearby electrically charged molecules. b. a changing electric field causes a changing magnetic field. c. magnetic molecules in a medium transfer their energy to nearby magnetic molecules. d. a changing magnetic field causes a changing electric field.