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chapter 20
Term | Definition |
---|---|
boiling point | the temperature at which the pressure of the vapor in the liquid is equal to the external pressure acting |
buoyancy | ability of a fluid- a liquid or a gas to exert an upward force on and object immersed in the fluid |
diffusion | spreading of particles throughout a given volume until they are uniformly distributed |
heat of fusion | amount of energy required to change a substance from the solid phase to liquid phase |
heat of vaporization | the amount of energy required for the liquid at its boiling point to become a gas |
kinetic theory | explanation of the behavior of molecules in matter moving particles that collide without losing energy |
melting point | temperature at which a solid begins to liquefy |
pascal | SI unit of pressure |
plasma | matter consisting of positively and negatively charged particles |
pressure | amount of force exerted, per unit area SI unit is the pascal |
thermal expansion | increase in size of a substance |
viscosity | a fluids resistance to flow |