Round to the hundredths place. 21. A proton is traveling in a magnetic field. The velocity of the proton is 1.87 x 10 m/s and is perpendicular
to the field strength of 1.1 T. What is the radius of the proton traveling in a magnetic field? Put answer in
scientific notation rounding to the ones places (example 5.96e-19 would be 6e-19).

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.