Answer:
The total momentum of the two objects before the collision is equal to the total momentum of the two objects after the collision.
The answer is the Second one
Answer:
Ultraviolet light is a stronger type of light. The light the dentist uses is a softer light that is just used to help you see.
Explanation:
From the word compound, the compound machine is already a combination of two or more types of simple machine. Thus, the answer is letter C. Because of its complexity, it is able to perform several other functions than a simple one.