Advertisements
Advertisements
प्रश्न
Explain how the principle of echo is used by
The dolphin to locate small fish as its prey.
Advertisements
उत्तर
Dolphins sends the sound having frequencies between 120 kHz to 150KHz. The returning echoes used to help their prey.
APPEARS IN
संबंधित प्रश्न
Write true or false for a given statement.
A ticking clock sound is heard late when heard through a metal.
State the factors on which the pitch of a sound depends.
List four substances which are good absorbers of sound.
When we change a feeble sound to a loud sound, we increase its :
A medium is necessary for ______ of sound.
Sound travels in air:
Two observers are stationed in two boats 4.5 km apart. A sound signal sent by one, under water, reaches the other after 3 seconds. What is the speed of sound in the water?
Unwanted sounds are called ______.
Two sound waves X and Y have the same amplitude and the same wave pattern but their frequencies are 60 Hz and 120 Hz respectively, then ______.
