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m&m 4.1

Describing Fluids

QuestionAnswer
Liquids Has a definite volume but no definite shape
Gases Has no definite volume or shape
John Dalton Provided atomic theory of matter
Atomic theory of matter All matter is made up of extremely small particles called atoms which combine into molecules
Daniel Bernoulli Helped lay foundation for our understanding of behavior of molecules and kinetic theory of matter
Kinetic theory of matter The molecules of matter are in constant motion
Diffusion The mixing of molecules of one fluid through another by random molecular motion
Cohesion The attraction of molecules of the same type
Adhesion The attraction which causes molecules of different kinds of matter to stick together
Surface tension The tendency of a liquid to act as if it has a thin film on its surface
Capillary action The phenomenon in which liquids in thin tubes rise above (or fall beneath) their own levels
Specific gravity A number which compares that object's density to the density of water. SG=D.O./D.W.
Hydrometer A simple device for measuring the specific gravity of liquids
Pressure The force exerted per unit of area. Pressure=Force/Area
Compression pressure An external force applied to a fluid by its container
Gravitational pressure Fluid's weight cause it to exert more pressure at greater depths. Exerted by a fluid at a given depth is applied equally in every direction
Fluid Means "flowing" includes water, liquids, air, gases
Created by: Jer Stephens
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