Advertisements
Advertisements
Question
The time interval between a lightning flash and the first sound of thunder was found to be 5 s. If the speed of sound in air is 330 m s-1, find the distance of flash from the observer.
Solution
Speed of sound in air (V) = 330 m/s
Time in which thunder is heard after lighting is seen (t) = 5s
Thus, distance between flash and observer = V x t = (330 x 5) = 1650 m
APPEARS IN
RELATED QUESTIONS
Name the type of waves which are used by astronauts to communicate with one another on moon (or in outer space).
Fill in the blank with suitable word.
Sound cannot travel through ____________.
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 does the speed of sound in air vary with temperature?
Complete the following sentences :
When sound travels in a medium, the particles of medium ___________ but the disturbance ___________.
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.
What are the requisites of the medium for the propagation of sound? Briefly, explain them.
Explain the effect of density on the speed of sound.
State three characteristics of the medium required for the propagation of sound.
______ is the distance between two consecutive particles.
