In the vast ocean, there are always some miraculous life forms,
Today we are going to introduce the pistol shrimp that seems to be weak and has superior ability. Also known as avocado shrimp.
The pistol shrimp is an extraordinary creature, about 4 cm long and weighing about 25 grams. Despite its small size, it can incorporate its paws at a speed of 97 km / hr. The speed of the snap is so fast that it creates bubbles made up of vacuum.
The internal low pressure causes the water pulse to immobilize the prey and produce a noise of 218 dB, which is louder than a bullet, and for us humans, the sound is actually not as loud, this is due to the explosion lasting only a small second.
The reported temperature is 4800 degrees Celsius, similar to the surface temperature of the Sun, which is four times that of lava. Despite the small size. In addition, there are brief flashes of light.
At a pressure of 80 kPa measured at 4 cm from the claw, the water jet travels at a speed of 25 m/sec, enough to kill a small fish.
<h1 class="pgc-h-arrow-right" data-track="26" > how pistol shrimp produce so much energy</h1>
This phenomenon of force, noise, heat and light from this small creature seems to violate the law of conservation of energy, but in reality, this phenomenon is based on Bernoulli's principle.
When a liquid moves at a certain speed, the pressure in the liquid decreases. We see this in rivers and liquids flowing through pipelines. When the pressure drops, tiny bubbles form, and if the pressure rises, the bubbles burst.
Implosion leads to compression, which can immediately generate enormous amounts of heat, known as the aero effect. In pipes and water thrusters, these effects will destroy the chips over time through continuous explosions of thermal energy.
Interestingly, the loud sound is not caused by the closing paws. Instead, the opening of the claw accelerates a certain amount of seawater to a high enough speed to cause cavitation, which leads to very low pressure areas.
Where there are low-pressure bubbles, there is a tendency to fill bubbles, and the washed water moves behind the pressure wave, moving faster than the speed of sound in the empty space.
This leads to an instantaneous release of energy, where the temperature is higher than 4800 degrees Celsius and a huge pressure is created, resulting in a visible arc of plasma, which in turn causes another compression, the so-called cavitation effect. This leads to a phenomenon in which the sound can emit light is called acoustic luminescence.
<h1 class="pgc-h-arrow-right" data-track="26" > interfered with World War II</h1>
The mighty pistol shrimp brought incredible disaster to the U.S. Navy's defense program during World War II.
The sound of pistol shrimp crackling interfered with the sonar used to detect enemy ships, which plagued the U.S. Navy for a long time, so American sailors brought in researchers from the War Research Department of the University of California. So the scientists sorted through the sources and recorded the shrimp's sound to train sonar operators to identify them as marine creatures rather than enemies.