A contact force is a type of force which act on an object by coming in contact with the object. Examples of contact force that acts through a force field are: applied force, frictional force, air resistance force, tension, spring force, etc.
Examples of forces that act through a force field are gravitational force, electromagnetic force, the weak interaction and the strong interaction.
The sound waves are closer together as the ambulance approaches and farther apart as it speeds away.
This is because of the doplar effect.
An area of the earth that suggests the earth is one big jigsaw is, the outer surface.
Dont worry about that first guy. I dont care about points just wanna help! Anyway the answer would be B
Explanation:The eart runs on an axis around the sun and would follow that axis for the following summer
Refraction refers to any bending of waves due to a change in speed. In the case of light being refracted by a prism, dispersion means that the higher the frequency light bends more. In short, Refraction is the bending of light and Dispersion is the frequency dependece of this behaviour.