A pure phase of matter exists during what parts of the heating curve?

The grooves or folds of the brain are called

If i initially have a gas at a pressure of 12 atm, a volume of 23 liters, and a temperature of 200 k, and then i raise the pressure to 14 atm and increase the temperature to 300 k, what is the new volume of the gas?

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains