A disk of radius R with uniform distribution of mass M, rotates about axis perpendicular to its plane at the rim with angular speed w. the moment of inertia of the disk about the axis

through the center is 1/2MR2. What is the kinetic energy of the​

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.