From what I know; When a sample of liquid water vaporizes into water vapor, the electrons in the water sped up due to heat.
Light will travel more slowly in a material with a higher index of refraction
Answer:
Machines are faster and more efficent
Explanation:
Decreasing the distance between two objects having a considerable mass would increase the attraction on gravitation. The reverse is true that if you separate or inrease the objects distance would substantially decrease their gravitational attraction. Most object in our planet is held by its gravitational force towards it's center.
The answer might be C ? hope it's right