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Consider the following statements with respect to sound:
1. It can travel through solids, liquids, gases and vacuum.
2. The intensity of sound is measured in decibels (dB).
3. For the human ear, the range of audible frequencies is roughly from 20 Hz to 20,000 Hz.
Which of the statements given above is/are correct?
- a)1 Only
- b)2 and 3 Only
- c)3 only
- d)1, 2 and 3
Correct answer is option 'B'. Can you explain this answer?
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Most Upvoted Answer
Consider the following statements with respect to sound: 1. It can tr...
The correct answer is option 'B': 2 and 3 Only.
Explanation:
1. It can travel through solids, liquids, gases, and vacuum.
This statement is incorrect. Sound cannot travel through a vacuum because it requires a medium to propagate. Sound is a mechanical wave that travels by compressing and decompressing particles in a medium, such as air, water, or solids. In a vacuum, there are no particles to vibrate, so sound cannot travel.
2. The intensity of sound is measured in decibels (dB).
This statement is correct. The intensity of sound refers to the amount of energy carried by sound waves. It is measured in a unit called decibels (dB). The decibel scale is logarithmic, which means that a small change in decibel value represents a large change in sound intensity. The decibel scale is commonly used to measure the loudness of sounds.
3. For the human ear, the range of audible frequencies is roughly from 20 Hz to 20,000 Hz.
This statement is correct. The human ear can perceive sound waves within a certain range of frequencies. This range is commonly referred to as the audible frequency range. For most individuals, the range of audible frequencies is approximately from 20 Hz (low-pitched sounds) to 20,000 Hz (high-pitched sounds). However, the exact range can vary slightly from person to person.
In summary, statement 1 is incorrect as sound cannot travel through a vacuum. Statement 2 is correct as the intensity of sound is measured in decibels. Statement 3 is correct as the range of audible frequencies for the human ear is roughly from 20 Hz to 20,000 Hz. Therefore, the correct answer is option 'B': 2 and 3 Only.
Explanation:
1. It can travel through solids, liquids, gases, and vacuum.
This statement is incorrect. Sound cannot travel through a vacuum because it requires a medium to propagate. Sound is a mechanical wave that travels by compressing and decompressing particles in a medium, such as air, water, or solids. In a vacuum, there are no particles to vibrate, so sound cannot travel.
2. The intensity of sound is measured in decibels (dB).
This statement is correct. The intensity of sound refers to the amount of energy carried by sound waves. It is measured in a unit called decibels (dB). The decibel scale is logarithmic, which means that a small change in decibel value represents a large change in sound intensity. The decibel scale is commonly used to measure the loudness of sounds.
3. For the human ear, the range of audible frequencies is roughly from 20 Hz to 20,000 Hz.
This statement is correct. The human ear can perceive sound waves within a certain range of frequencies. This range is commonly referred to as the audible frequency range. For most individuals, the range of audible frequencies is approximately from 20 Hz (low-pitched sounds) to 20,000 Hz (high-pitched sounds). However, the exact range can vary slightly from person to person.
In summary, statement 1 is incorrect as sound cannot travel through a vacuum. Statement 2 is correct as the intensity of sound is measured in decibels. Statement 3 is correct as the range of audible frequencies for the human ear is roughly from 20 Hz to 20,000 Hz. Therefore, the correct answer is option 'B': 2 and 3 Only.
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Consider the following statements with respect to sound: 1. It can tr...
- Sound cannot travel in vacuum.The intensity of sound is measured in decibels (dB).The number of oscillations per second is called the frequency of oscillation. Frequency is expressed in Hertz.
- Its symbol is Hz. A frequency of 1 Hz is one oscillation per second. Sounds of frequencies less than about 20 vibrations per second (20 Hz) cannot be detected by the human ear.
- On the higher side, sounds of frequencies higher than about 20,000 vibrations per second (20 kHz) are also not audible to the human ear. Thus, for the human ear, the range of audible frequencies is roughly from 20 to 20,000 Hz.
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Consider the following statements with respect to sound: 1. It can travel through solids, liquids, gases and vacuum.2. The intensity of sound is measured in decibels (dB).3. For the human ear, the range of audible frequencies is roughly from 20 Hz to 20,000 Hz.Which of the statements given above is/are correct?a) 1 Onlyb) 2 and 3 Onlyc) 3 onlyd) 1, 2 and 3Correct answer is option 'B'. Can you explain this answer?
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