14. I was riding my bike 4 m/s, and then I started going down a steep hill. In just 3 seconds, my speed had increased to 13 m/s. What was my rate of acceleration in m/s?? A. 7.30 m/s? B. 17.33 m/s2 C. 8.33 m/s2 D. 11.67 m/s?

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.