What do a window, mirror and a prism have in common, and what makes them different?

If the speed of a particle triples ,by what factor does its kinetic energy increase?

Aquarterback pedals 3.3meters southward and then run 5.7meters northward. whats the distance ? and whats the displacement?

Find the magnetic field a distance r from the center of a long wire that has radius a and carries a uniform current per unit area j in the positive z direction.