a scientist designs an experiment to see which brand of cell phone battery will last the longest. what is the independent variable?

answer: 0.20

explanation: this can only be the answew because all the other measuremnets are not close

waves moving from a fast medium to a slow medium will experience a reflection as light travels more slowly than red light. total internal reflection occurs when the critical angle is.

blue light is scattered in different directions by the tiny molecules of air. blue is scattered more than other colours because it has a shorter distance to travel which results in smaller waves. this is why we see a blue sky most of the time.