Advertisements
Advertisements
Question
A boy fires a gun and another boy at a distance of 1020 m hears the sound of firing the gun 3 s after seeing its smoke. Find the speed of sound.
Advertisements
Solution
Speed = `"Distance travelled "/" time taken"`
Speed = ` 1020/3 = 340 "m s" ^-1`
APPEARS IN
RELATED QUESTIONS
Fill in the blank.
Sound travels faster in ________ than in liquids.
Can sound travel through solids and liquids ? In which of these two does it travel faster ?
A boy on a hill A fires a gun. The other boy on hill B hears the sound after 4 s. If the speed of sound is 330 m s-1, find the distance between the two hills.
Guess which sound has a higher pitch:
If you want to hear a train approaching from far away, why is it more convenient to put the ear to the track?
Calculate the speed of a sound wave whose frequency is 2 kHz and wavelength 65 cm.
The incidence of ______ in daily life shows that the velocity of sound is less than the velocity of light.
Nita heard the sound of lightning after 4 seconds of seeing it. What was the distance of the lightning from her?
(The velocity of sound in air is 340 m/s.)
Helium gas is filled in two identical bottles A and B. The mass of the gas in the two bottles is 10 gm and 40 gm respectively. If the speed of sound is the same in both bottles, what conclusions will you draw?
An ultrasonic wave is sent from a ship towards the bottom of the sea. It is found that the time interval between the transmission and reception of the wave is 1.6 seconds. What is the depth of the sea, if the velocity of sound in the seawater is 1400 ms–1?
