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chapter 16
solids liquids and gasses
Term | Definition |
---|---|
boiling point | the temperature at witch the pressure of the vapor in the liquid is equal to the external pressure acting on the surface of the liquid |
buoyancy | ability of a fluid-a liquid or a gas-to exert an upward force on an 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 the 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 states that all matter is mad of constantly moving practicals that collide without losing energy |
melting point | temperature at witch a solid begins to liquefy |
pascal | SI unit of pressure |
plasma | matter consisting of positively and negatively charged partials |
pressure | amount of force exerted per unit area;SI unit is the physical |
thermal expansion | increase in the size of a substance when the temperature is increased |
viscosity | a fluid's resistance to flow |