child blows air at one end of the straw and slowly Cuts of pieces of the straw from the other end what will be the outcome that will be observed
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As the pipe gets cut the length of the resonating column varies and so that the particular length there will be an audible frequency that will be heared.
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The outcome that will be observed by the child is that he will hear sounds coming from the straw pipe.
- When a child blows air through the straw with cuts, then the pressure in his mouth is high and as air goes through the pipe pressure in the pipe will drops
- We know that when we vibrate anything at its natural frequency it resonates
- Due to this resonance phenomenon a sound wave will be produced and heard.
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