Advertisements
Advertisements
प्रश्न
Name the unit used to measure the loudness of sound. Also write its symbol.
Advertisements
उत्तर
Loudness of sound is measured in decibel. Its symbol is dB.
APPEARS IN
संबंधित प्रश्न
Give two practical applications of reflection of sound waves.
Explain how bats use ultrasound to catch a prey.
How is ultrasound used for cleaning?
A sonar device on a submarine sends out a signal and receives an echo 5 s later. Calculate the speed of sound in water if the distance of the object from the submarine is 3625 m.
Define the 'frequency' and 'time-period' of a wave. What is the relation between the two?
Write the full name of 'SONAR'.
Draw labelled diagrams to represent sound of (a) low pitch, and (b) high pitch, of the same loudness.
Write any three applications (or uses) of ultrasound.
What is sonar ? Explain its use.
In SONAR we use:
