A current of 5.0 A flows through a 0.50 m length of wire connected to a 4.5 V battery. a What is the resistance of the wire? b What is the electric field in the wire? c A 1.0 m length of the same wire is connected to the battery. What current will flow through the wire?

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.