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samenvatting NA havo 3 H3

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samenvatting van hoofdstuk 3 natuurkunde havo 3. het gaat over energieomzetting en vermogen.

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  • April 19, 2021
  • 1
  • 2020/2021
  • Summary
  • Secondary school
  • 3
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Samenvatting hoofdstuk 3

Energievormen:
- elektrische energie (Eel)
Bijvoorbeeld uit een stopcontact
- chemische energie (Ech)
Van brandstof en voedsel naar verbranding
- warmte (Q)
Door stroom
- zwaarte-energie (Ez)
Hoe hoger, hoe meer zwaarte-energie
- kinetische energie (Ekin)
Alles met snelheid
- stralingsenergie (Estr)
Bijvoorbeeld zonnestralen

Energieometting:
Energieomzetting = een elektrische energie naar één of meer andere vormen van
energie omzetten.

Wet van behoud van energie:
Bij het omzetten van energie komt er nooit energie bij en gaat er geen energie af.

rendement:
De verhouding tussen de nuttige energie en de toegevoegde energie.

Arbeid en energieomzetting:
w=Fxs
W = arbeid in J
F = kracht in N
S = afstand in m

Vermogen:
Nuttige vermogen = arbeid die de motor per seconde verricht.

P=W:t of P=E:t
P = vermogen n J/s of W
W = arbeid in J
E = omgezette energie in J
T = Tijd in s

Warmte:
Hoeveelheid energie die tussen twee voorwerpen wordt uitgewisseld.

Soortelijke warmte:
Q = warmte in J
C = soortelijke warmte in J/( kg x cº )
M = massa in kg

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