physics wk 2 Flashcards
hydrostatics s the study of
fluids that are not moving
hydrodynamics is the study of
fluids in motion
a fluid is a material that has the ability to
flow (liquids and gases)
Pressure=
force/area
at the same depth in fluid, fluid exerts
the same pressure and in all directions
What is pascals principle
pressure applied to a confined fluid increases the pressure throughout the fluid by the same amount
Archimedes principle
an object immersed either totally or partially in a fluid feels a buoyant force equal to the weight of the fluid displaced
hydrometer measures
specific gravity of liquids
bernoulli’s principle
as the speed of a fluid increases, the pressure exerted by the fluid decreases.
shape of flow pattern in pipe
concave with molecules at wall moving slower
poiseulle determined that the laminar flow rate of an incompressible fluid along a pipe is proportional to the ______ power of the pipes radius
fourth
poiseulle law yields three ways to increase the fluid flow through an IV
increase size of catheter, shorter length, add pressure bag/raise IV bag height
Reynolds number is inversely proportional to
viscosity
Reynolds number is proportional to
density, velocity, and tube diameter
Specific gravity is
relationship of density related to water
1mmHg is equal to cmH2O
1.36cmH2O
Atm is equal to lbs per sq in
14.7lbs/in2
Flow rate equals
volume/time ex 3L/min
a solution is a
homogenous mixture that consists of one or more solutes
solvent is
large amount
solute
smaller amount than solvent
molality is
concentration in terms of moles of solute per kilogram of solvent
molarity is
defined as moles of solute per liter of solution
molality and molarity are never
equal
Supersaturated
a solution contains more solute than allowed by the solubility THIS IS NOT A STABLE SYSTEM
lidocaine hydrochloride has an ______ bond, it is readily soluble in _______.
ionic, water
as partial pressure increases, solubility
increases
Henrys law
the amount of a non reacting gas which dissolves in liquid is DIRECTLY PROPORTIONAL to the partial pressure of the gas, provied the temp remains constant
As temperature increases, solubility
decreases
a cold patient receiving anesthetic gas solubiltiy _______ and emergence will be _____
increases, longer
density=
mass/voume
atm= _____ torr and _____ mmHg
760
laminar flow is
when a fluid streams through a tube, the particles comprising the fluid may move along lines parallel to the walls of the tube.
visocity
Force required to push a plate having specific area at a speed over a layer of liquid of certain thickness.
poiseulle law deals with
laminar flow only
greater lipid solubility=
greater potency
MAC decreases by ____ for every decrease in temp by 1C
2-5%
Cardiac output is _______ proportionate to uptake of gas, ______ CO _________ anesthetics delivered to brain
inversely, decreased, increases
What is important with local anesthetics with duration of action
protein binding
