Advertisements
Advertisements
प्रश्न
State the approximate speed of ultrasound in air.
Advertisements
उत्तर
The approximate speed of ultrasound in air is 330 m/s-1.
APPEARS IN
संबंधित प्रश्न
The sketches I to IV in following Figure show sound waves, all formed in the same time interval.
 |
 |
| I | II |
 |
 |
| III | IV |
Which diagram shows
- a note from a musical instrument
- a soft (or feeble) note,
- a bass (low frequency) note.
Which has the higher frequency - ultrasonic sound or infrasonic sound?
Complete the following sentences:
An average person can hear sound of frequencies in the range ______ to _________.
Complete the following sentence:
Elephants produce ____________sound.
How do bats locate their prey during a flight?
State four practical uses of ultrasonic vibrations.
An electromagnetic wave has a time period of 4 × 10-8 s. Calculate its frequency in MHz.
What are ultrasonic?
State the main components of a hearing aid.
Ultrasound has frequency of vibration
