# Shared Flashcard Set

## Details

Unit 3 RT210
physics
16
Physics
07/15/2014

Term
 Melting
Definition
 Solid to liquid state Internal KE increases molecular vibrations (when heat is applied) Melting point - temp at which solid changes to liquid Latent heat of fusion- Extra heat (external energy) needed to change solid to liquid
Term
 Graham's Law
Definition
 The rate of diffusion of a gas is inversely proportional to the square root of its gram molecular weight lighter gases diffuse rapidly, heavy fases diffuse more slowly At capillary level diffusion moves blood The lighter the gas the easier the flow
Term
 Gas density
Definition
 The ratio of a substance's mass to its volume A dense substance has a high atomic weight A low density substance has a low concentration of light atomic particales per unit of volume
Term
 Properties of Gases
Definition
 Gas pressure - measure of force per unit area Tension- the pressure extended by gas when disolved in water
Term
 PAir
Definition
 PAir = pn2 +po2  (pn2=79%+po2=21%) PA= pressure in avioli Pa= pressure in artery (po2) Air is a gas mixture
Term
 Dalton's Law
Definition
 Total pressure of a gas mixture must equal the sum of all partial pressures of all component gases percentage of gas in mixture expressed in decimal form Low pressures decrease Pi02 Hyperbaric pressures increases Pi02
Term
 Henry's Law
Definition
 Predicts how much of a given gas will dissolve in a liquid High temp decreases solubility/low temp increases it High temp= increased kinetic energy causes more vapor to escape Solubility coefficient volume of gas that will dissolve in 1ml of a given liquid at standard pressure and temp
Term
 Correction factors
Definition
 STPD- Standard temp(0 degrees celcious) and pressure(270mm/hg), air(0%saturated) ATPS-Ambient temp(surrounding temp) ,pressure(270mm/hg) and saturated BTPS-Body temp(37 degrees c ),pressure(270mm/hg) and saturated
Term
 Gas Behavior
Definition
 Critical pressure                                                                    needed to maintain equillibrium between gas and liquid phases of a substance at this critical temp Critical  temperature The highest temp at which a substance can exist as a liquid
Term
 Gas Laws
Definition
 Boyle's law   (inversly related)B.a.T= temp constant Charles Law    (Directly related )                                               C.a.P= pressure constant Gay-lussac's law (Directly related)                                                       G.l.oVe = volume constant (Directly related)
Term
 Flow dynamics
Definition
 Flow os the bulk movement of a substance through space Hydrodynamics - study of fluids in motion   Second law of thermodynamics In any mechanical prosses, there will always be a decrease in the total energy available to do work (potential energy)
Term
 Flow patterns
Definition
 Laminar flow- Any fluid flowing in a strait pattern changes in tube length, flow of gas, resistance, radius,or viscosity of fluid causes change in driving pressure (Poiseuille's law) Turbulent flow ( reynold's law) - Exceeds 2000 Transitional Flow (mixture of laminar and turbulent flow) Law of Continuity (jet nebs) The more cross sections the slower the air flow
Term
 Fluid entrainment
Definition
 Bernouli affect Flowing fluids lateral pressure must inversly with its velocity Gas going through a narrow passage increses velocity Fluids in an area moving faster than surrounding area posses less pressure
Term
 Relative Humidity
Definition
 The RH of a gas is the ratio of its actual water vapor content at given temp %RH=AH/saturated capacity (100)
Term
 Body Humidity
Definition
 %BH=ratio of actual water vapor content to gas at body temp (37°c) %BH=AH/43.8/37°c(100)
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