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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.
Complete the following sentence:
Infrasonic sound is of frequency ______________.
Complete the following sentence:
Bats can produce and hear ___________ sound.
Complete the following sentence:
Elephants produce ____________sound.
Name the sound of the frequency given below:
1000 Hz
What do you understand by the term infrasonic vibrations?
What do you understand by the term sonic vibrations? State the range of sonic vibrations for the human ear.
An electromagnetic wave has a time period of 4 × 10-8 s. Calculate its frequency in MHz.
What is echocardiography?
What does SONAR stand for? Where do we make use of SONAR?
