What was the scientific basis for the unit amu

What was the procedure by which case united states vs lopez went to court

Which form of relativism states that people rely on their own standards of right and wrong when making a decision?

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