A compression is where the particles in the air are closer together, so where those black lines are closer together.
A rarefaction is the opposite, where they're spread out.
The wavelength is the distance between two compressions or rarefactions (i.e. two peaks or troughs on a graph), therefore thats the horizontal arrows.
The amplitude is the distance from the centre of the wave to the peak or trough, so that is the vertical distance on the diagram.
Examples of Newton's 2nd Law If you use the same force to push a truck and push a car, the car will have more acceleration than the truck, because the car has less mass. It is easier to push an empty shopping cart than a full one, because the full shopping cart has more mass than the empty one.
The Momentum Calculator uses the formula p=mv, or momentum (p) is equal to mass (m) times velocity (v).
Next to south america plate and cocos plate
Hope this helps :)
