UPSC Prelims 2003·GS1·science-and-technology·science and technology

Which one of the following statements is correct?

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  1. AThe velocity of sound in air increases with the increase of temperatureCorrect
  2. BThe velocity of sound in air is independent of pressure
  3. CThe velocity of sound in air decreased as the humidity increases
  4. DThe velocity of sound in air is not affected by the change in amplitude and frequency

Explanation

The velocity of sound in air increases with the increase of temperature. Higher temperatures increase the kinetic energy of air molecules, facilitating faster sound transmission. The relationship follows the formula: velocity is proportional to the square root of the absolute temperature. Option C is incorrect because sound actually travels faster in humid air, not slower. Water vapor molecules are lighter than nitrogen and oxygen molecules, making humid air less dense. Options B and D are also scientifically accurate: velocity of sound is independent of pressure at constant temperature, and velocity depends on the medium properties, not on amplitude or frequency.
science-and-technology: Which one of the following statements is correct?

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