Advertisements
Advertisements
प्रश्न
A boy fires a gun and another boy at a distance hears the sound of fire 2.5s after seeing the flash. If the speed of sound in air 340 m/s, find distance between the boys.
Advertisements
उत्तर
Speed of sound in air (V) = 340 m/s
Time in which sound of fire is heard after flash is seen (t) = 2.5s
Thus, distance between flash and observer = V x t = (340 x 2.5) = 850 m
APPEARS IN
संबंधित प्रश्न
Can sound travel through a vacuum ? Describe an experiment to explain your answer.
State one observation from everyday life which shows that sound travels much more slow than light.
The frequency of the sound emitted by the loudspeaker is 1020 Hz. Calculate the wavelength of the sound wave in air in cm where its velocity is 340 m/s.
The sound waves travel fastest :
Give scientific reasons:
As the sound wave propagates from one place to the other in air, the air itself is not required to move from one place to the other.
How long will sound take to travel in (a) and iron rail and (b) air, both 3.3 km in length? Take speed of sound in air to be 330 m/s and in iron to be 5280 m/s.
Describe an experiment to prove that a material medium is necessary for the propagation of sound.
Can sound propagate in solids and liquids?
Does audible range of frequency vary from person and also with the age of the person?
The small to and fro motion is called vibration.
