Klank word geskep wanneer iets vibreer. Dié vibrasie, wat niks anders as golwe van energie is nie, beweeg deur die lug of 'n ander medium (vaste stof, vloeistof of gas) na die oor.
17 Jul
Afrikaans
South Africa
Education · Kids & Family
Die Gelofte is ʼn belofte wat ʼn groep Voortrekkers onder leiding van Andries Pretorius gedurende die Bloedrivier-veldtog teen die Zoeloes in 1838 gemaak het.
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