# Physical Principles in RT Part 4.txt

 The flashcards below were created by user MagusB81 on FreezingBlue Flashcards. Look up page 109 in Rays text book and page 108. all on henry's law The Law that states: the volume of a gas varies inversely with its pressure. Boyle's Law The formula for Boyle's Law PV(1)=PV(2) The Law that states the volume of a gas varies directly with changes in temp. Charles' Law The formula for Charles' Law V/T(1)=V/T(2) The Law that sates: the pressure exertd by a gas varies directly with its absolute temp. Gay-Lussac's Law Gay-Lussac's formula P/T(1)=P/T(2) What is the formula for the universal gas Law? PV/T(1)=PV/T(2) What does STP mean? 0C and 760mmHg Body temp BT means? 37C Ambient temp. (AT) or pressure (AP) means? The existing environmental temp. or pressure.( opp. of STP) Saturated gas (S) means? a volume of gas with a relative humidity of 100% at any given temp. Dry gas (D) means? a volume of gas w/ no vapor in it. STPD means? a volume of dry gas at temp. of 0C and Pressure 760mmHg BTPS means? a volume of gas saturated w/ water vapor at 37C and ambient enviroment pressure. ATPS means? a volume of gas saturated with water vapor at ambient temp. (room temp.) and pressure. When reporting: reporting gases in the lungs are recorded as? BTPS When reporting: gases that undergo chemical rxn in the body, such as blood gases, are recorded? STPD If saturated gas vol. are to be used in physiologic calc., they are fist________, then calc, back to______. corcected to their dry volume, the saturated value. Is the temp. above which the kinetic activity of its molecules is so great that the attactive forced cannot keep them in a liquid state. It is the highest temp. at which a substance can exist as a liquid. Crtical temp. of a liquid. Is the oressure neede to maintain equilibrium between the liquid and gas phases of a substance at this critical temp. Critical pressure. Is where you have critical temp. and critical pressure of a substance. Critical point A gas that has a critical temp. so low that at room temp. and press. it cannot exist as a liquid. True Gas is the gaseus state of a substance coexisting with its liqud or solid state at room temp. and pressure. Vapor is the bulk movement of a substance through space. Flow is the study of fluids in motion. Hydrodynamics The pressure exerted by a liquid in motion depends on the nature of _____ not just the depth and density of the fluid. Flow itself It states that in any mechanical process, there will always be a decrease in the total energy available to do work. The Second Law of Thermodynaics As fluid flows through a tube there will be a pressure drop along the way due to? a cumulative energy loss What is the forumla for total flow resistance? R=(P1-P2)/V In the flow resistance equations what does P1 stand for? it is the pressure at the upstream point In the flow resistance formula what does P2 stand for? it is the pressure at the downstream point In the flow resistance formula, what does V stand for? It is the flow Flow where a fluid moves in discrete cylindrical layers or streamlines. laminar flow Determines the pressure difference required to produce a given flow, under conditions of laminar flow through smooth tube of a fixed size. Poiseuille's Law Formula of for poiseuille's law. Determines press. diff. to prod. a flow. DeltaP= 8nlv/pir^4 in poiseuille's formula delta P stands for? the driving pressure gradient in poiseulle's formula n stands for? the viscosity of the fluid in poiseulle's formula l stands for? the tube length in poiseulle's formula v stands for? the fluid flow in poiseulle's formula r stands for? the tube radius For fluids flowinf in a laminar pattern, the driving pressure will increase whenever the_________? fluic viscosity, tube length, or flow increases. Greater pressure will be required to maintain a given flow if the tube radius_____? decreases flow where ther fluid molecules form irregular eddy currents on a chaotic pattern. Turbulent flow Formula for reynolds number Nr=vxdx2r/n in reynolds number formula v stands for? linear velocity in reynolds number d stands for? fluid density In reynolds number r stand for? the tube radius in reynolds number n stands for? viscosity In a smooth-bore tube, laminar flow becomes turbulent when Nr exceeds______. 2000 These conditions favor what type of flow: increased fluid velocity, increased fluid density, increased tube radius, or decreased fluid viscosity? turbulent flow When flow is turbulent the press. diff across a tube is defined by what formula? deltaP = flV^2/4pi^2r^5 deltaP = flV^2/4pi^2r^5 f stands for? friction factor based on the fluid's density and viscosity and the tube wall roughness. deltaP = flV^2/4pi^2r^5 l stands for? the tube length deltaP = flV^2/4pi^2r^5 v stands for? the fluid flow deltaP = flV^2/4pi^2r^5 r stands for? the radius To double flow under laminar conditions, you only need to double ____. the dricing pressure To double flow under turbulent conditions, you would have to? increase the dricing pressure fourfold is a mixture of laminar and turbulent flow. transitional flow flow in the respiratory tract is mianly____ transitional when all else is equal, pressres generated during laminar flow are most effect by fluid viscosity, whereas fluid density is the key factor when? flow is turbulent the most common units for flow are? L/min or L/sec The most common unit for velocity are? cm/sec fluid velocity, at a constant flow, varies inversely with the cross-sectional area of the tube. This relationship is called? Law of Continuity what kind of effect is done when a fluid flows through a tube of uniform diameter, pressure drecreases prgressively over the tube lenght. The Benoulli AuthorMagusB81 ID121344 Card SetPhysical Principles in RT Part 4.txt DescriptionRESP 130 Updated2011-12-06T23:08:42Z Show Answers