The index of refraction is the ratio of the speed of light in a vacuum to the speed of light in a medium. Which true statement is based on this definition? A. Materials with a low index of refraction cause light to refract very little.

B. Materials with a low index of refraction do not refract light.

C. Materials with a low index of refraction cause light to refract a great deal.

You are traveling in a car going at a constant speed of 100km/h down a long, straight highway. you pass another car going in the same direction which is traveling at a constant speed of 80km/h. as measured from your car's reference frame this other car is traveling at −20km/h. what is the acceleration of your car as measured from the other car's reference frame? what is the acceleration of the other car as measured from your car's reference frame?

Acombination reaction is when two or more combine to form one product. a decomposition reaction is when a substance breaks down into two or more simpler substances in a chemical reaction.

If an atom contains 11 protons in its nucleus, predict the element with the atomic number and electronic configuration. will the number of electrons remain the same during the chemical reaction in such an atom? explain.