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Samenvatting Brug 1: Gezonde mens deel 3: exacte wetenschappen.
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samenvatting van cursus en pwp exacte wetenschappen. Gezonde mens deel 3. Brug 1
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Inhoudsopgave1 Druk van gassen en vloeistoffen.................................................................3
1.1 Definitie en eenheid van druk...................................................................3
1.1.1 Definitie..............................................................................................3
1.1.2 Eenheid van druk...............................................................................3
1.2 Atmosfeerdruk of Patm...............................................................................4
1.2.1 Definitie atmosfeerdruk......................................................................4
1.2.2 Variatie van de atmosfeerdruk...........................................................4
1.2.3 Meting van de atmosfeerdruk............................................................4
1.2.4 Overdruk – onderdruk – vacuüm.......................................................4
1.3 Druk OP een vloeistof...............................................................................5
1.3.1 Wel van Pascal..................................................................................5
1.4 Druk IN een vloeistof................................................................................5
1.4.1 Definitie hydrostatische druk of Phydr..................................................5
1.4.2 Factoren die de hydrostatische druk beïnvloeden.............................5
1.4.3 Hoofdwet van de hydrostatica – Formule hydrostatische druk..........6
1.4.4 Totale druk in een open vloeistof.......................................................6
1.5 Verplaatsing van vloeistof en gas.............................................................7
1.5.1 Drukverschil bij hoogteverschil..........................................................7
1.5.2 Drukverschil bij externe zuigbron.......................................................9
1.5.3 Capillaire opstijging............................................................................9
2 Gaswetten....................................................................................................10
2.1 Toestandsgrootheden van een gas........................................................10
2.2 Drukwet van Gay-Lussac........................................................................10
2.2.1 Verband tussen druk en temperatuur bij constant volume..............10
2.2.2 Verklaring.........................................................................................10
2.3 Wet van Boyle en Mariotte......................................................................11
2.3.1 Verband tussen druk en volume bij constante temperatuur............11
2.3.2 Verklaring van de wat van Boyle en Mariotte...................................11
2.4 Wet van Henry........................................................................................12
2.6 Gascilinders............................................................................................12
1
,3 Concentratie en transportprocessen........................................................13
3.2 Mengsels................................................................................................13
3.2.2 Colloïdale mengsels.........................................................................13
3.2.3 Homogene mengsels of oplossingen...............................................13
3.3 Oplosbaarheid........................................................................................14
3.3.2 Oplosbaarheid van stoffen...............................................................14
3.3.3 Vetten en gassen in waterig midden................................................15
3.4 Concentratie...........................................................................................16
3.4.1 Belang van concentraties.................................................................16
3.4.2 Relatieve atoom- en molecuulmassa...............................................16
3.4.6 Concentratieweergave.....................................................................16
4 Transportprocessen....................................................................................17
4.1 Passief transport.....................................................................................17
4.1.1 Diffusie.............................................................................................17
4.1.2 Osmose............................................................................................18
4.1.3 Filtratie/ compartimenten.................................................................20
4.2 Actief transport........................................................................................21
Exacte wetenschappen
2
, 1 Druk van gassen en vloeistoffen
1.1 Definitie en eenheid van druk
1.1.1 Definitie
Druk is de verhouding v/d grootte v/d kracht tot de oppervlakte waarop de
kracht werkt.
Druk = kracht of p= F
oppervlakte A
P = pressure, F = force, A = area
1.1.2 Eenheid van druk
1N = 1 Pa (pascal) (1N/m² = 100g/1m²)
1m²
Andere eenheden in de medische wereld:
1 atm = 760 mmHg = 1 bar = 105 Pa = 10 mH2O
1 cm H2O 1 mmHg
1 cm H2O - 0,76
1 mmHG 1,3 -
3
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