Question

3. How is the sound produced by whistling?
4. How is the sound produced by beating a drum?


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Answer 1

Explanation:

3)Air enters the whistle at one end. As the air reaches the other, closed end, all the air molecules "pile up" on top of each other and cause a high-pressure region. The air escapes out the little hole in the end, making the noise you hear. The frequency of the sound is dependent on the length of the whistle.

4)The vibration of the head shakes the entire drum

Striking the head of the drum changes its shape and compresses the air inside the shell. ... These vibrations of the top and bottom heads create vibrations in the air, which become sound, and eventually, as the head vibrations are dampened, the sound diminishes.

Answer 2

Answer:

3 .Air enters the whistle at one end. As the air reaches the other, closed end, all the air molecules "pile up" on top of each other and cause a high-pressure region. The air escapes out the little hole in the end, making the noise you hear. The frequency of the sound is dependent on the length of the whistle.

4.The vibration of the head shakes the entire drum

Striking the head of the drum changes its shape and compresses the air inside the shell. ... These vibrations of the top and bottom heads create vibrations in the air, which become sound, and eventually, as the head vibrations are dampened, the sound diminishes.

Explanation:

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