Water contained in a closed, rigid tank, initially saturated vapor at 180°C, is cooled to 100°C. Determine the initial pressure, in MPa, and the final quality.

The force will determine the acceleration.

The pilot of a helicopter hovers at an altitude of 1200 feet over a park. the angle of depression to the base of a statue is 17 degrees. the angle of depression to the nearest park exit, in line with the statue, is 14 degrees. to the nearest foot, what is the distance from the statue to the exit?

Is a volume of space that is empty of matter.