Advertisements
Advertisements
प्रश्न
Name three animals which can hear ultrasonic vibrations.
उत्तर
Certain creatures like dogs, bats, dolphins, and mosquitoes can detect the waves.
APPEARS IN
संबंधित प्रश्न
Write true or false for a given statement.
The frequency is measured in hertz.
Define time period ?
Write the audible range of frequency for the normal human ear.
Draw a graph between displacement from mean position and time for a body executing free vibrations in vacuum.
Give two examples each of longitudinal waves and transverse waves.
The sound of an explosion on the surface of a lake is heard by a boat man 100 m away and by a diver 100 m below the point of explosion.
(i) Who would hear the sound first: boatman or diver?
(ii) Give a reason for your answer in part (i).
(iii) If sound takes time t to reach the boatman, how much time approximately does it take to reach the diver?
The sound waves travel faster ______.
Number of vibrations produced in one second is ______.
Write any two uses of ultrasonic sound.
