Standard deviations can be compared Multiple select question. for data sets with the same measurement units. for data sets with different measurement units. for data sets with the same measurement units and similar magnitude. for data sets with the same measurement units but greatly different magnitudes.

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.