Advertisements
Advertisements
Question
Numerical problem.
A stone is dropped from the top of a tower 750 m high into a pond of water at the base of the tower. Calculate the number of seconds for the splash to be heard? (Given g = 10 m s–2 and speed of sound = 340 m s–1)
Advertisements
Solution
(Given g = 10 m s– 2 and speed of sound = 340 ms– 1)
Height = 750m
h = ut + 0.5 gt2
The initial velocity is 0
750 = 0.5 × 10 × t2
t = 10sec
Speed of sound is `(340"m")/"sec"`
So, time taken to travel 750m upwards is,
`750/340"` = 2.20s
time taken = 10 + 2.20 = 12.2 sec.
APPEARS IN
RELATED QUESTIONS
A sound wave travels at a speed of 339 m s−1. If its wavelength is 1.5 cm, what is the frequency of the wave? Will it be audible?
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.
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.
If you want to hear a train approaching from far away, why is it more convenient to put the ear to the track?
Fill in the blank and explain.
The velocity of sound in steel is ______ than the velocity of sound in water.
The incidence of ______ in daily life shows that the velocity of sound is less than the velocity of light.
The speed of sound in air at 0°C is 332 m/s. If it increases at the rate of 0.6 m/s per degree, what will be the temperature when the velocity has increased to 344 m/s?
Write the formula for speed of sound in a gas using Laplace correction.
Why does the flash of lighting reach earlier than the sound of thunder?
On which factors does the speed of sound in the gaseous medium depend?
