The tendency of a material to return to its original shape after being deformed when force is applied on it

The bending of light when it travels from one medium to another of different optical densities.

What phase of mitosis where each chromosome's sister chromatids separate and move to opposite poles of the cell?

Simplify:(4-5)-(13-18+2)=

What is 5/6 divided by 2/3?       

If you have a ten percent off coupon for a 20-peso item, how much will the item cost?