rrosa522 said:Homework Statement
A submarine sends out a sonar wave that has
a frequency of 545 Hz. If the wavelength of the
sound is 2.60 m, how long does it take for the
echo to return when the sound is reflected from
a submarine that is 5.50 km away?
Homework Equations
The Attempt at a Solution
i used the equation p=1/f and i plugged in frequency and got 0.00183 seconds, the right answer should be around 7-8 seconds
thank you so much, i finally got the right answer!SteamKing said:Well let's see here. Is it perhaps you calculated the period of one wavelength and overlooked the fact that it takes more than one wave of length 2.60 m to cover the distance of 5.50 km to the object and then 5.50 km back again to the sub?
An echo is a sound that is repeated or reflected off of a surface, creating a delayed repetition of the original sound.
The time it takes for an echo to return is affected by the distance between the sound source and the reflecting surface, as well as the reflective properties of the surface. The type and intensity of the sound also play a role.
The time for an echo to return can be measured using a stopwatch or a timer. The time is calculated by measuring the time between the emission of the sound and the reception of the reflected sound.
Yes, the speed of sound can affect the time for an echo to return. The speed of sound is influenced by factors such as temperature, humidity, and altitude. As these factors change, the speed of sound also changes, which can impact the time it takes for an echo to return.
Yes, there is a maximum distance for an echo to return. This distance is determined by the intensity of the sound, the reflective properties of the surface, and the sensitivity of the human ear. In most cases, the maximum distance for an echo to return is around 17 meters.