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Samenvatting Fysica

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Samenvatting lessen theorie Fysica. 1ste jaar BMLT

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June 4, 2024
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SAMENVATTING FYSICA
1. FYSISCHE GROOTHEDEN EN EENHEDEN

1.1 GROOTHEDEN EN EENHEDEN



 Hoeken
o Straal: 1m : 2πm
o 360° of 2π rad
o Booglengte gevormd op een cirkel = α
*r*m
 SI – eenhedenstelsel




1.1.1 DICHTHEID
 Massa = hoeveelheid mater
 Hoe groter de massa, hoe groter het volume, hoe groter de plaats dat het voorwerp inneemt
 ρ=m/V
 Materiaalconstante


1.1.2 DICHTHEID VAN OPLOSSINGEN EN MENGSELS
 Vaste stof in een vloeistof, vb. Zout oplossen in water: volume stijgt niet, massa neemt toe -> dichtheid
oplossing groter dan water alleen
 Vloeistof in een vloeistof
o Totaal volume stijgt (som beide vloeistoffen) -> ideaal mengsel
o Totaal Volume wijkt iets af van de soms beid vloeistoffen -> niet-ideaal mengsel
o Massa is wel som van de massa's vd vloeistoffen
▫ Niet-ideale mengsels
o Volume wijkt af van de som
o Reden: onderlinge aantrekkingskracht tussen moleculen
 Vb, aantrekkingskracht tussen watermolecule en molecule ethanol is groter dan die van 2
ethanol
o De dichtheid is hoger dan verwacht




1

, 1.1.3 SAMENSTELLING BLOED
 Na centrifugeren (onder nr boven): rode bloedcellen, witte bloedcellen, plasma
 Hematocrietwaarde = volumeverhouding van rode bloedcellen t.o.v. totale volume bloed = 45% (bestaat ui
rode bloedcellen)


1.1.4 CONCENTRATIES
 Concentratiestof = hoeveelheidstof/ hoeveelheidoplossing
 massaconcentratiestof = massastof/ massaoplossing
 volumeconcentratiestof = volumestof/ volumeoplossing


1.1.5 DRUK
 ρ=F/A | druk = kracht / oppervlakte
 In Pa (pacal) | 1 N/m²




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