I think it's in Antarctica. The frozen water :/
<span>the interference of two waves of equal frequency and opposite phase, resulting in their cancellation where the negative displacement of one always coincides with the positive displacement of the other.</span>
First of all the reason the graph would be a curve is because, as the time increases the position changes, at first the ball is at a certain point then it starts rolling off a cliff so its moving foward and then the ball starts falling, (If too confusing here is a image http://www.mazzworld.net/U11Image1.gif)
Nutrients, for example, (sugars and starch) and proteins can be recognized by the use of an indicator, which is a synthetic that delivers a trademark shading when a specific substance is available.