Advertisements
Advertisements
प्रश्न
Can you hear each other in a dark room?
उत्तर
Yes, we can hear in the darkroom.
APPEARS IN
संबंधित प्रश्न
How are the wavelength and frequency of a sound wave related to its speed?
Which characteristics of the sound helps you to identify your friend by his voice while sitting with others in a dark room?
Write true or false for a given statement.
Larger is the amplitude, feeble is the sound.
Name the two characteristics of sound which differentiate two sounds from each other.
Define the term wave velocity. Write its S.I. unit.
Answer the following question :
Can sound travel in vacuum?
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?
For which range of frequencies, human ears are most sensitive?
A person fires a gun and other boy at a distance hears the sound of the fire 2.5 s after seeing the flash. If the speed of sound in air is 330 ms-1, find the distance between the boys.
