Why is evaporation of water a physical change? in terms of substances, why is evaporation of water a physical change and not a chemical change? ?

The graph above shows how the price of cell phones varies with the demand quantity. the equilibrium price for cell phones is where both supply and demand quantities equal $100, 5,000 5,000, $100

How did planetesmals form planets? a. they broke apart into smaller chunks. b. they collided and stuck together. c. they cooled and pulled ice together. d. they began to rotate.

Why doesn't heat added to water make the tempature rise above 100c