Anyone willing to buy something from my fundraiser? i have no supporters yet :( plz dont answer unless you want to- will give 200 points if you help

Which of these would be caused by a chemical change? a) the formation of lava. b) sedimantary rock layering over time. c) metamorphic rock forming from igneous. d) metamorphic rock eroding to form sedimentary rock.

When the speed of the bottle is 2 m/s, the average maximum height of the beanbag is m.

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?