Which describes Einstein's general theory of relativity? Check all that apply. oIt replaced the special theory of relativity.
oIt applies to accelerating objects.
oIt applies to objects in uniform motion.
o It applies to objects in a gravitational field.
o It is an extension of the special theory of relativity.
oIt applies to objects in free fall.

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.