Advertisements
Advertisements
प्रश्न
Advertisements
उत्तर
Velocity of sound = `"distance travelled"/"time taken" = (2"d")/"t"`
t = `(2"d")/"v" = (2 xx 660)/330` = 4s
Thus, the girl hears the echo after 4s.
APPEARS IN
संबंधित प्रश्न
What do you mean by a vibratory motion?
What is sound ?
Are sound waves longitudinal or transverse?
The longitudinal waves travel in a coiled spring at a rate of 4 m/s. The distance between two consecutive compressions is 20 cm. Find :
(i) Wavelength of the wave (ii) Frequency of the wave
In fig. shows a snap shot of a wave from of frequency 50 Hz in a string. The numbers in the diagram represents distance in centimeters. Fpr the wave motion, find
(a) Wavelength,
(b) Amplitude,
(c) Velocity.
The speed of sound in air at 0°C is nearly :
Describe briefly an experiment to prove that vibrating bodies produce sound.
Can you hear each other in a dark room?
A person hearing at one end of a long metal bar hears two distinct sounds when the other end is struck with a stone. Explain, giving scientific reasons
Match the following
| 1. | Infrasonic | (a) | Compressions |
| 2. | Echo | (b) | 22 kHz |
| 3. | Ultrasonic | (c) | 10 Hz |
| 4. | High-pressure region | (d) | Ultrasonography |
