A rollercoaster is designed as shown below. If the roller coaster starts at the top of the
first hill from rest, describe what will happen to the rollercoaster. How could you fix this
problem?

The rocks expand when there hot/warm  and contract when they are cold.

Answer (d) the universe had cooled enough for atoms to combine, protons and neutrons were too far apart to form nuclei;

Supply is the markets term for selling a specific quantity of products at various prices. the law of supply and demand is the one which affect the pricing and also the quantity the market is able to produce or make available.