Most of the mass of an atom is found in

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

When a scientific theory has been tested and proved by the scientific community, it becomes a law

What does the symbol (–hfus) indicate in a phase change?