Physics
Grade-8
Easy
Question
The louder unpleasant sound is called as ______.
- Music
- Noise
- Ultra
- Infra
Hint:
Noise is an unpleasant sound.
The correct answer is: Noise
- A pleasant sound is called music.
- A louder unpleasant sound is called noise.
- So, the correct option is b.
Related Questions to study
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SONAR is used in _______.
- It works on the principle of reflection of ultrasound waves.
SONAR is used in _______.
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- It works on the principle of reflection of ultrasound waves.
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The sound from the transmitter of the SONAR is reflected by.
The sound from the transmitter of the SONAR is reflected by.
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The SONAR can detect the enemy ship using _________.
The SONAR can detect the enemy ship using _________.
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Distance can be measured in ___________.
- The SI unit of time is second.
- The SI unit of pressure is pascal.
- The SI unit of force is newton.
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- The SI unit of pressure is pascal.
- The SI unit of force is newton.
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The SI unit of velocity is kg/s.
The SI unit of velocity is kg/s.
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Guitar can produce __________.
Guitar can produce __________.
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If the velocity of sound is 3 m/s and the distance between the object is 3 m, find the time taken to hear an echo?
If the velocity of sound is 3 m/s and the distance between the object is 3 m, find the time taken to hear an echo?
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Sounds which are unpleasant to hear are called ________.
- A pleasant sound is called music.
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Decreasing amplitude decreases _______.
Decreasing amplitude decreases _______.
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Amplitude is denoted by __________.
Amplitude is denoted by __________.
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An increase in amplitude makes a sound wave _______.
An increase in amplitude makes a sound wave _______.
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Sounds that are pleasant to hear are called ultrasounds.
Ultrasounds are high frequency sounds.
Sounds that are pleasant to hear are called ultrasounds.
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Ultrasounds are high frequency sounds.
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Communication in the submarines is using infra waves.
Communication in the submarines is using infra waves.
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The device that transmits ultrasounds in SONAR is called _______.
- A receiver receives the sound reflected from the depths of the sea and perceives it.
The device that transmits ultrasounds in SONAR is called _______.
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- A receiver receives the sound reflected from the depths of the sea and perceives it.
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Sound cannot travel through _________.
Sound cannot travel through _________.
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