Physics
Grade-8
Easy
Question
The SI unit of speed of sound is ____.
- m/s
- m/s2
- m2/s
- m
Hint:
The SI unit of speed of sound is m/s.
The correct answer is: m/s
- The speed of sound can be represented by a meter per second.
- It shows the distance traveled by the sound wave in a second.
- So the speed of sound can be written as m/s in SI units.
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The audible frequency range of an average human ear is ____.
- Sound which has frequency less than 20Hz is called infrasound.
- Sound which has frequency more than 20KHz is called Ultrasound.
The audible frequency range of an average human ear is ____.
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- Sound which has frequency less than 20Hz is called infrasound.
- Sound which has frequency more than 20KHz is called Ultrasound.
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The formula for calculating the speed of a sound wave is v = ____.
The formula for calculating the speed of a sound wave is v = ____.
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The distance covered by a sound wave in a unit time is called ____.
The distance covered by a sound wave in a unit time is called ____.
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The loudness of a sound decreases as we move away from a source of the sound. This is because _____.
The loudness of a sound decreases as we move away from a source of the sound. This is because _____.
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The loudness of sound I is ____ to the loudness of sound II.
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