Heat q flows spontaneously from a reservoir at 418 k into a reservoir at 298 k. because of the spontaneous flow, 2840 j of energy is rendered unavailable for work when a carnot engine operates between the reservoir at 298 k and a reservoir at 236 k. find q.

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.