Physics: Principles and Problems
Chapter 13 Vocab
Fluids - ✔️✔️Materials (liquids and gases) that flow and have no definite shape of their own.
Pressure - ✔️✔️The force on a surface, divided by the surface's area.
Pascal - ✔️✔️The SI units of pressure.
Combined gas law - ✔️✔️For a fixed amount of an ideal gas, the pressure times the volume, divided
by the Kelvin temperature equals a constant; reduces to Boyle's law if temperature is constant and to
Charles's law if pressure is constant.
Ideal gas law - ✔️✔️For an ideal gas, the pressure times the volume is equal to the number of moles,
times the constant, R, and the Kelvin temperature; predicts the behavior of gases remarkably well unless
high-pressure or low-temperature conditions.
Thermal expansion - ✔️✔️A property of all forms of matter that causes the matter to expand,
becoming less dense, when heated.
Plasma - ✔️✔️A gaslike, fluid state of matter made up of negatively charged electrons and positively
charged ions that can conduct electricity; makes up most of the matter in the universe, such as stars.
Adhesive forces - ✔️✔️The electromagnetic forces of attraction that particles of different substances
exert on one another; responsible for capillary action.
Pascal's principle - ✔️✔️States that any change in pressure applied at any point on a confined fluid is
transmitted undiminished through the fluid.
