100+ Physics Sound Questions and Answers - 1
What is SONAR?
SONAR is the short name for Sound Navigation and Ranging.
It is an instrument which is helpful to estimate the depth of the sea.
What are the harmful effects of noise pollution?
Noises of high intensity may produce irritation, psychological problems, hearing problem, headaches, dizziness and nausea, high blood pressure, nervousness etc.
What is the velocity of sound in air, water and iron?
The velocity of sound in air at 0°C is 331 m/s.
The velocity of sound in water at 20°C is 1482 m/s.
The velocity of sound in iron (steel) is 5000 m/s.
Define amplitude of vibration?
The maximum displacement of a vibrating body from its mean position is called amplitude (a).
What are the frequency ranges of audible and inaudible sounds?
Sound waves of frequencies ranging from 20 Hz to 20,000 Hz are audible to human ear.
Sounds of frequencies greater than 20,000 Hz are known as ultrasonic.
These vibrations are not audible to human ear.
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