13 Justify Why can a ray be used to represent light in a ray diagram?
A Light waves are electromagnetic waves.
B Light waves spread out in all directions.
C Light waves travel in straight lines.
D Light waves can be reflected or refracted.

How are calculation for velocity and speed different

If jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, is being done.

Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?