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The density of air at some point in a longitudinal sound wave is minimum at an instant. The pressure of air
at that point is :
- a)minimum
- b)maximum
- c)equal to atmospheric pressure
- d)none of the above
Correct answer is option 'A'. Can you explain this answer?
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The density of air at some point in a longitudinal sound wave is minim...
Understanding Sound Waves
Sound travels through a medium, such as air, as a longitudinal wave. This means that the particles of the medium vibrate back and forth in the same direction as the wave travels.
Key Concepts of Sound Waves
- In a longitudinal wave, areas of compression and rarefaction are created.
- Compression occurs where particles are close together, resulting in increased pressure.
- Rarefaction occurs where particles are spread apart, leading to decreased pressure and density.
Minimum Density and Pressure Relationship
- At the point of minimum density in a longitudinal wave, the air particles are spread apart the most.
- This expansion results in a decrease in pressure at that point because fewer air molecules are exerting force on each other.
Conclusion
- Therefore, when the density of air is at a minimum, the pressure is at a minimum as well.
- This is why, at that instant, the pressure of the air is not only lower than average but also specifically at a minimum.
In summary, the correct answer is option 'A' (minimum pressure) because minimum density correlates with minimum pressure in the context of sound waves.
Sound travels through a medium, such as air, as a longitudinal wave. This means that the particles of the medium vibrate back and forth in the same direction as the wave travels.
Key Concepts of Sound Waves
- In a longitudinal wave, areas of compression and rarefaction are created.
- Compression occurs where particles are close together, resulting in increased pressure.
- Rarefaction occurs where particles are spread apart, leading to decreased pressure and density.
Minimum Density and Pressure Relationship
- At the point of minimum density in a longitudinal wave, the air particles are spread apart the most.
- This expansion results in a decrease in pressure at that point because fewer air molecules are exerting force on each other.
Conclusion
- Therefore, when the density of air is at a minimum, the pressure is at a minimum as well.
- This is why, at that instant, the pressure of the air is not only lower than average but also specifically at a minimum.
In summary, the correct answer is option 'A' (minimum pressure) because minimum density correlates with minimum pressure in the context of sound waves.
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The density of air at some point in a longitudinal sound wave is minim...
Minimum, Option A
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The density of air at some point in a longitudinal sound wave is minimum at an instant. The pressure of airat that point is :a)minimumb)maximumc)equal to atmospheric pressured)none of the aboveCorrect answer is option 'A'. Can you explain this answer?
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