The colors that you see on the CD are created by white light reflecting from ridges in the metal. When light reflects off or passes through something with many small ridges or scratches, you often get rainbow colors and interesting patterns. They are called interference patterns.
The use of force to move an object is called work. This only applies if the object moves.
Answer:
16 male students, 11 female students
Put oil on a table, that would reduce friction
To what i see, the answer is....
C.
