During which of the following activities may in inflatable personal flotation device to be used

The radius of an atom is closest in size to a

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.

Which property is expressed in distance units? o a. period o b. wavelength o c. speed o d. frequency