Can an echo travel through water? Detailed answer

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Can an echo travel through water? Detailed answer

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Can an echo travel through water?

Let's find out what causes the echo and whether the echo can travel through water. Sound travels from its source in open air at a speed of about 375 meters per second. It diverges in waves, like circles that appear on the water from a thrown pebble. Sound waves travel in all directions, like the light from a light bulb. Sound can hit an obstacle and be reflected, just like light is reflected.

When sound is reflected, it is heard as an echo. Therefore, an echo is a sound repeated by reflection. Not all obstacles can cause an echo: there are some objects that can absorb sound rather than reflect it. If the sound is reflected by some obstacle, only one echo is heard. This is a simple echo. If the sound is reflected by two or more obstacles, the echo can be repeated many times. Each time, however, the echo gets weaker until it disappears completely. When it is repeated more than once, it is called a complex echo, or reverb.

An echo cannot be heard as a separate sound until the sound has receded some distance from the reflecting surface. Because of this, there is a time difference between the sound and the echo. For example, if the distance to the wall is 167 meters, then the echo will return after one second.

The ability of an echo to travel through water depends on the ability of sound to travel through water, and we know that sound travels in water. The speed of sound in water is 1430 meters per second! This ability of sound to produce echoes in water is of great benefit.

Ships are often equipped with instruments that send and receive sound signals underwater. By sending directional signals and timing the return of the echo, the navigator can measure the distance from his vessel to the ocean floor, to any nearby vessel or obstacle!

Author: Likum A.

Random interesting fact from the Great Encyclopedia:

Why does iron rust?

If you leave any iron object in a damp and damp place for several days, it will rust, as if it had been painted with reddish paint.

What is rust? Why does it form on iron and steel objects? Rust is iron oxide. It is formed as a result of the "combustion" of iron when combined with oxygen dissolved in water.

This means that in the absence of moisture and water in the air, there is no oxygen dissolved in water at all and rust does not form.

If a raindrop falls on a shiny iron surface, it remains transparent for a short period of time. Iron and oxygen in the water begin to interact and form an oxide, that is, rust, inside the drop. The water becomes reddish and the rust floats in the water as small particles. When the drop evaporates, rust remains, forming a reddish layer on the surface of the iron.

If rust has already appeared, it will grow in dry air. This is because the porous rust patch absorbs the moisture in the air - it attracts and holds it. This is why it is easier to prevent rust than to stop it once it has appeared. The problem of rust prevention is very important, since iron and steel products must be stored for a long time. Sometimes they are covered with a layer of paint or plastic. What would you do to keep warships from rusting when not in use? This problem is solved with the help of moisture absorbers. Such mechanisms replace moist air in compartments with dry air. Rust in such conditions can not appear!

Test your knowledge! Did you know...

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