The treasure turns out to be buried 400 meters at 20 degrees northeast from the starting point this would be the straight- line path from start to end). However the directions take several steps and if you add up the individual steps, they total
600 meters. It takes a person following the map 500 seconds to reach the treasure
Ok

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.