PHY 206 Lecture 1: Chapter 13 - fluids notes part 1
30 Jun 2018
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Phasescfmatter
Fluids at rest fluidstatics Fluids donotwithstandsheer
force
Fluids in motion fluiddynamics
solid fixed shape size
liquid takesonshapeofcontainer incompressible
volumecanonlybechanged bysignificantlylarge force
gasf Volume shapenotfixed expands to fillits container
tame atvery
high
temp ionized
atoms
liquids gases havetheabilitytoflow fluids
colloids
suspensions of tinyparticlesin aliquid
Liquids intermediate between
solids liquids
Densitytspeeificgravity
density pmassper unit volume Kg1ms
Pim
specificgrai Ratio ofdensity oftheobjecttodensity of water 4C
SG F
Density of Water 1.0091cm3e1.00 103
Kg m3
Pressureinfth
Pressure forceper unit area
scalar pressure PIN for Pascal
Force magnitudeofforce perpendicular to SA
fluids
exertpressure in anydirection
Pressure being thesame ineverydirection in nonmoving fluid
otherwise fluid would be in motion
Forcedullopressureinafiluidatrestisalwaysperpendiculartosurt
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Pressurevaryingwithdepthm Fng pmg pAhg
Ah 7Volumeofliquid column
1h 4PEA pAhy
A
µppgh_
Area doesNOTaffectpressure at agivendepth
pg pressure increases ul depth
ZPo
1Pressure atdepth hye yPo ext pressure
Surface
IdP IIpgdy RRtfpgdy
Pip in RPpg ya Y
Ps Potpkg
AtmosphericPressureandGaugePressi
AvgAtmosphericpressure 1.013 x105
Mm
sea level
1atm 1.013 X105 NIm2101 3k Pa atmosphere
bad 1bar 1.000 105Nm2
GaugePressaney pressureaboveand beyondatmospheric pressure
AbsolulePressuret atmospherepressure tgaugepressure
Po tPo
