
Fysik/Kemi - Alinea - Øre, lyd & bølger
Presentation
•
Physics
•
8th Grade
•
Practice Problem
•
Hard
Thomas Pilgaard
FREE Resource
3 Slides • 2 Questions
1
Lydbølger
Lydstyrke
Frekvens
Øre, lyd & toner
2
En svingning er fra startposition til startposition.
En svingning er altså frem OG tilbage.
3
Multiple Choice
Antal svingninger per sekund
Periode
Frekvens
Amplitude
Hyppighed
4
Multiple Choice
Antallet af svingninger strengen udfører hvert sekund
Amplituden
Hyppigheden
Frekvensen
Bølgelængden
5
Frekvensen måler antal svingninger per sekund
Frekvens forkortes "f".
Et lommeur kan ikke lave en hel svingning på 1 sekund. Det giver en frekvens på fx. 0,25.
En højtalermembran kan svinge mange gange på 1 sekund.
Den kan have frekvenser fra 20 Hz til 20.000 Hz.
Hertz (Hz) = per sekund
Lydbølger
Lydstyrke
Frekvens
Øre, lyd & toner
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