If an ice cube melts at 0°c, but water also freezes at 0°c, what is the difference between melting and freezing in terms of a. the energy involved in the phase changes b. particles of the substances during the phase changes? ⚠ not multiple choice! use complete sentences.

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.