Which range of the pH scale would most likely include acid rain?

Which changes of state do the labels represent? a: b: c:

1.what is where an object is located 2. what is how fast an objects speed is changing 3. what is how fast an object is moving

You throw a small rock straight up from the edge of a highway bridge that crosses a river. the rock passes you on its way down, 7.00 s after it was thrown. what is the speed of the rock just before it reaches the water 28.0 m below the point where the rock left your hand? ignore air resistance.