1136 Definitions Flashcards
What is a compound?
Compounds are substances composed of two or more elements that are chemically combined in definite proportions.
What is a mixture?
Mixtures are substances that contain atoms of more than one kind and that have been physically combined.
What is plasma?
Plasma is matter in which electrons are stripped from their nuclei
What is elasticity?
Elasticity is the property which tends to return a solid to its original size and shape when a stress is removed.
What is Hooke’s law?
strain is proportional to stress provided the elastic limit is not exceeded
What is strain?
The measure of deformation of a body by stress
What is cohesion?
The force that holds molecules together
What is pressure?
Force per unit area
What does the principle of buoyancy state?
The lifting force on an object immersed in a fluid is equal to the weight of the fluid displaced by the object.
What is Pascal’s principle?
The pressure applied to a fluid confined in a container is transmitted undiminished throughout the fluid and acts in all directions.
Capillary action
the rise or depression of a liquid in a narrow tube.
Water rises when a narrow glass tube is placed in it, while mercury is depressed
attraction between two different kinds of substances
adhesion
upward force a liquid exerts on an object
buoyancy
rise or depression of liquids in narrow tubes
capillary action
attraction among molecules of a substance
cohesion
science of forces acting on liquids
hydraulics
shape of the surface of a liquid
meniscus
force per unit area
pressure
force producing relatively tough surface layer on liquids
surface tension
reduce surface tension in water
heat and detergents
liquid to gas
vaporization
gas changes to liquid
condensation
solid changes to liquid
fusion
liquid changes to gas below the boiling point
evaporation
