It takes 25.7 n to push a crate
at a constant speed across flat
ground where mk = 0.238.
what is the normal force acting
on the crate?
(unit = n)

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.