Examples of jet propulsion: photo

Reactivity and movement with the help of this - a fairly widespread phenomenon in nature. Well, scientists and inventors "spied" and used it in their technical developments. Examples of jet propulsion can be seen everywhere. Often we ourselves do not pay attention to the fact that this or that object - a living being, a technical mechanism - moves with the help of this phenomenon.

What is jet propulsion?

In a living nature, reactivity is a movement that can occur when a particle separates from the body of a particle at a certain rate. In technology, a jet engine uses the same principle - the law of conservation of impulses. Examples of rocket propulsion: in a rocket consisting of a shell (which also includes an engine, control devices, a useful area for moving loads) and fuel with an oxidizer, the fuel burns out, turning into gases that are jetted outwards through a nozzle, Giving the whole design speed in the opposite direction.

Examples of jet movement in nature

Quite a number of living beings use this principle of motion. It is characteristic for larvae of some species of dragonflies, jellyfish, mollusks - scallop, cuttlefish, octopus, squid. And in the plant world - the flora of the Earth - there are also species that use this phenomenon for insemination.

"Squirting cucumber"

Examples of jet propulsion provide us with flora. Only in appearance this plant with a strange nickname is similar to the usual cucumbers. And the epithet "rabid" it has got because of not absolutely habitual way of distribution of the seeds. Ripening, the fruits of the plant bounce off the stems. As a result, an opening is formed through which the cucumber shoots out a liquid containing the seeds suitable for reproduction, using reactivity. And the fruit itself can fly at a distance of up to 12 meters in the opposite direction to the shot.

How does the cuttlefish move?

Examples of jet propulsion are fairly widely represented in the fauna. Cuttlefish is a cephalopod mollusk, which has a special funnel that is in the front part of the trunk. Through it (and even through the additional side slit), water enters the animal's body, into the gill cavity. Then the liquid is ejected sharply through the funnel, and the cuttlefish can be directed laterally or backwards by a special tube. The resulting back force provides movement in different directions.

Salpa

These animals from the family of shells are bright examples of jet movement in nature. They have translucent cylindrical bodies of small size and inhabit the surface waters of the world's oceans. When moving, the animal draws water through a hole located in the front of the trunk. The liquid is placed in a wide cavity of its body, in which the gills are located diagonally. Salpa takes a sip of water, and at the same time, the hole closes tightly, and the muscles of the body - transverse and longitudinal - contract. From that, the entire body of the salpa shrinks, and the water is pushed out of the back hole. Thus, salpas use the principle of reactivity in their movement in the water element.

Jellyfish, shellfish, plankton

In the sea there are still inhabitants who move in this way. All at least once, while resting on the coast, met in the water various types of jellyfish. But they also move, using reactivity. Marine plankton, more precisely, some of its species, mollusks and scallops - they all move like that.

Examples of reactive movement of bodies. Squid

The unique structure of the body has a squid. In fact, in its structure, nature has a powerful jet engine with excellent efficiency. This representative of the fauna of the seas and oceans dwells at times at great depths and reaches enormous dimensions. Even the animal's body resembles a rocket with its forms. More precisely, this modern invented by scientists rocket simulates the forms of squid, created by nature. And for leisurely movements in the water environment, a fin is used, but if you need a jerk, then the principle of reactivity!

If you are asked: give examples of jet movement in nature, then first you can talk about this mollusk. His muscular mantle surrounds the cavity, which is in the body. Water is sucked in from outside, and then it is thrown out rather sharply through a narrow nozzle (reminiscent of a missile). Result: the squid moves in jerks in the opposite direction. This feature allows the animal to move with rather high speeds, overtaking its prey or leaving the chase. It can develop the speed to match a well-equipped modern vessel: up to 70 kilometers per hour. And some scientists, exploring the phenomenon in detail, say a speed of 150 km / h! In addition, this representative of the ocean has a good maneuverability due to the tentacles, folded bundle, bending when moving in the right direction.