Why do you like your crush?

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

State one important difference between a physical change and a chemical change?

If c + di is a point on the circle, then | c + di |=