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Fluid
Something that has the ability to flow

Density
mass per unit volume of a substance

relative density
ratio of the density of the object to the density of pure water

pressure
force acting perpendicular to a unit area

barometer
measures atmospheric pressure. a thin strong walled glass tube sealed at one end and open at the other.

absolute pressure
the total pressure

gauge pressure
any additional pressure over atmospheric pressure

manometer
u shaped piece of glass tube that is partially filled with water

buoyant force
upward force on submerged objects

hydrometer
measure the densities of liquids

Blaise pascal
a french mathematician, scientist, and philosopher, discovered one of the most important properties of fluids

Archimedes
greatest scientist and mathematician of ancient Greece

Bernoulli
Swiss physicist

About Fluids
 Pressure at equal depths in a given fluid is equal
 Pressure is exerted equally in all directions
 Pressure is exerted perpendicular to any surface with which the fluid is in contact

Bernoulli's Principle
For steady fluid flow, where the velocity of the fluid is high its pressure is low, and where the velocity is low the pressure is high

Archimedes Principle
An object immersed in a fluid experiences a buoyant force that is equal in magnitude to the force of gravity on the displaced fluid

Pascal's Principle
Pressure exerted on a contained fluid is transmitted undiminished throughout the fluid acting in all directions and perpendicular to the walls of the container

A floating object displaces its own weight of the liquid in which it is floating

Normal atmospheric pressure= 760 mm Hg (mercury)

