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प्रश्न
State the approximate speed of ultrasound in air.
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उत्तर
The approximate speed of ultrasound in air is 330 m/s-1.
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संबंधित प्रश्न
A microphone is connected to the Y-input of a C.R.O Three different sounds are made in turn in front of the microphone. Their traces (a), (b) and (c) produces on the screen are shown in following figure.
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| (a) | (b) | (c) |
- Which trace is due to the loudest sound? Give reason for your answer.
- Which trace is due for the sound with the lowest pitch? Explain your answer.
Name the sound of the frequency given below:
10 Hz
Name the sound of the frequency given below:
40 kHz
What do you understand by the term sonic vibrations? State the range of sonic vibrations for the human ear.
Name three animals which can hear ultrasonic vibrations.
What does SONAR stand for?
What are ultrasonic? State and explain two applications of ultrasounds.
Is the energy carried by the ultrasound very high or very low?
State the main components of a hearing aid.
The range of audible frequency for the human ear is
