S=ut+0.5*a*t2
s=displacement
u=intial velocity=0m/s
t=time=7seconds
a=9.81m/s2
s=0*7+0.5*9.81*72
s=240.345m
To calculate the time it takes to hear an echo from a cliff 600 meters away, we first need to consider the speed of sound, which is approximately 343 meters per second in air. The total distance for the sound to travel to the cliff and back is 1,200 meters (600 meters to the cliff and 600 meters back). Therefore, the time to hear the echo is 1,200 meters divided by 343 meters per second, which is about 3.5 seconds.
When you shout at a cliff, the sound waves produced by your voice travel to the cliff and bounce back towards you, creating an echo. The time delay between your shout and the return of the sound wave gives the impression of a returning sound.
If it takes 15 seconds for an echo to be heard, the distance between you and the reflecting surface (such as a wall, cliff, or building) is approximately 2,250 meters (15 seconds multiplied by the speed of sound at sea level, which is about 343 meters per second).
Light travels faster than sound.
A lightning strike is about 1,100 feet away if you hear the thunder one second after the lightning flash. The distance varies somewhat with temperature, air pressure, and other environmental conditions.
Sai pump
Using the formula distance = speed x time, we can calculate the distance the sound traveled as 340 m/s x 3.2 s = 1088 meters. Since the sound took 3.2 seconds to reach you, the rock must have fallen for 1.6 seconds (half the time) before you heard it. Using the kinematic equation h = (0.5 x acceleration x time^2), and assuming the rock fell straight down with an acceleration of 9.81 m/s^2, we find the height of the cliff to be about 25 meters.
Because the sound energy (air compressions/rarefactions) can't escape from the pipe, while a lot of the sound energy can disperse sideways on its way there and back to a cliff. (You don't have to stand directly in front of someone to hear them speak).
sound is reflected when it strikes at any medium. a distant sound becomes clear if echo or reverbation takes place. an echo happens when one hears the reflection of the original sound 0.1 seconds later. and reverbation is multiple echo, which one can hear in sikandra at agra in india
they can hear sound in ears
Sound perspective is the way you hear a sound. (Where you hear it coming from)
the sound energy travels to everybody ears who can hear until it fades!!! It gets absorbed by anything in it's path including air molecules & converted to heat energy.