Fact 1: Blowing air into a whistle causes air to vibrate inside the whistle. Fact 2: Soon the wind blows in fresh air. Given the two facts above, what would wind going through a whistle cause?
Possible answers:
[i] vortex;
[ii] friction;
[iii] vibrant colors;
[iv] waves;
[v] Energy.;
[vi] kinetic energy;
[vii] absence of sound;
[viii] vibrations;
Answer:
[viii]