Physics
Grade-6
Easy
Question
Sounds of 15 Hz frequency are called _______.
- Ultrasound
- Infrasound
- Audible sound
- None of these
Hint:
The audible frequency range for human ear is from 20Hz to 20000Hz
The correct answer is: Infrasound
-
The audible frequency range for human ear is from 20Hz to 20000Hz , waves having frequency above 20000Hz , are called ultrasonic and below 20Hz , they are called infrasonic .
- Sounds of 15 Hz frequency are called _Infrasound
The audible frequency range for human ear is from 20Hz to 20000Hz , waves having frequency above 20000Hz , are called ultrasonic and below 20Hz , they are called infrasonic .
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If a body of mass 2 kg is at a height of 2 m, then find the gravitational potential energy with respect to earth (g =10 m/s2).
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If a steel plate is vibrated, it will produce _______.
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Ultrasounds have large frequency.
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Infrasound has great frequency.
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Human ear can hear __________.
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