Advertisements
Advertisements
प्रश्न
Explain how the principle of echo is used by
The dolphin to locate small fish as its prey.
उत्तर
Dolphins sends the sound having frequencies between 120 kHz to 150KHz. The returning echoes used to help their prey.
APPEARS IN
संबंधित प्रश्न
The bees do not have voice-boxes. How do they produce sound ?
What is the nature of sound waves in air?
Is pitch same as frequency?
The speed of sound in air at 0°C is nearly :
A cannon is fired at A (see diagram). An observer at B hears two sounds. The first sound is heard after 1 second and the second 3s after the observer sees the flash. (Velocity of sound = 340 ms−1)
(i) Why does the observer see the flash before he hears the sound?
(ii) Calculate the distance x between the observer and the wall.
What is the effect of temperature and pressure on the speed of sound in a gas?
Suppose that a sound wave and a light wave have the same frequency, then which one has a longer wavelength?
In which medium the speed of the sound is maximum?
The elastic property of medium is a factor of ______ medium.
