The bulk of peoples dreams occurs during what following state?

When fat comes in contact with sodium hydroxide, it produces soap and glycerin. determine whether this is a physical change or a chemical change. explain your answer

To create electromagnetic induction, which of the following has to move? a. a wire b. a magnet c. a transformer d. either a or b

The speed of light in a material is 0.50 c. what is the critical angle of a light ray at the interface between the material and a vacuum?