Amodel airplane moves twice as fast as another identical model airplane. compared with the kinetic energy of the slower airplane, the kinetic energy of the faster airplane is

Which one of the following research methods can show cause and effect

Light traveling in a medium with a refractive index 1.19 is incident on a plate of another medium with index of refraction 1.79. at what angle of incidence is the reflected light fully polarized?

What does si stand for, when referring to a system of measurement