How much pressure can human skin withstand?
In order to breach the human skin the ejection pressure has to be at least 100 pounds per square inch (psi)8 while most high-pressure guns and injectors reach pressures of 2000 to 12000 psi3. The puncture wound is small, inconsiderable and not distinct.
NCBI provides a short paper with a theoretical limit of 1000m for humans, based on data we have collected from saturation divers to date. That would be 100atm of pressure. Somewhere in between is the claimed record for deep diving which is roughly 600m.
A normal person is capable of a breath pressure of 1-2 psi, so by pressure breathing you can increase your lung pressure from 10.1 psi to 11.1-12.1 psi during each exhale, closer to the 14.7 psi you are used to.
It is soft, to allow movement, but still tough enough to resist breaking or tearing. It varies in texture and thickness from one part of the body to the next. For instance, the skin on our lips and eyelids is very thin and delicate, while skin on the soles of our feet is thicker and harder.
Exposure to 6000 psi, an enormous pressure, would likely cause immediate and catastrophic injury to a human. Such pressure could crush bones, rupture internal organs, and result in an instantaneous fatality. The human body is simply not designed to withstand such force.
As a fluid, air flows around you and tries to crush you in. Fortunately, there is typically just as much pressure inside your body pressing outward as there is air pressure outside your body pushing inward. They typically cancel out, meaning that there is no overall force on you and you don't get crushed.
It takes Six pounds of pressure to fracture the human skull. What is an equivalent analogy to that? Well, falling off a stationary bicycle ( and by that I mean a regular two wheel bicycle that happens to be not moving) onto cement or rock without a helmet on causes 5 to 6 pounds of pressure per square inch.
The highest sea-level pressure on Earth occurs in Siberia, where the Siberian High often attains a sea-level pressure above 1,050 hPa (15.2 psi; 31 inHg), with record highs close to 1,085 hPa (15.74 psi; 32.0 inHg).
While there's no precise depth at which a human would be 'crushed', diving beyond certain limits (around 60 meters) without proper equipment and gas mixes can lead to serious health issues due to the pressure effects on the body, including nitrogen narcosis and oxygen toxicity.
Our skin is so delicate that we can even cut it with a piece of paper.
How is human skin so strong?
The middle layer (dermis)
Under the epidermis, firmly stuck to it, lies the middle layer of skin (the dermis). It is made up of a dense network of tough, elastic collagen fibers. These make the skin strong and robust, while at the same time stretchy.
Thick skin definition
Thick skin is present on the soles of the feet and palms of the hands. This is because these areas receive more friction than other areas of the body, and thicker skin helps to protect from potential damage. The epidermis of thick skin can be up to 1.5 mm .
Too much pressure would collapse those spaces, crushing us. Animals adapted to deep-ocean life don't have air pockets in their bodies. Some marine animals travel between deep ocean and the surface.
The water pressure at the site of the Titanic wreck is roughly 6,000 psi (more than 41,000 kilopascals). Under this amount of pressure, even the slightest structural flaw could result in fatal consequences. Death would be virtually instantaneous for the occupants of the pressurised chamber.
1,043 ft this is the deepest ever(verified) achieved using scuba gear so close to this. So around 1100 ft is the crush depth of a human without anything more special then a wet suit.
The lowest tolerable pressure of air is about 0.47 atm (475 millibars of atmospheric pressure) - recorded at 5950m altitude. At about 0.35 atm (less than 356 millibars at around 8000m) life is impossible. Pulmonary and cerebral edema lead to death.
Your body would take between 18-36 hours to freeze in space due to the radiational cooling. There are other problems when it comes to being stranded in space though. While freezing is not your most immediate concern, oxygen and extreme low pressure are things to be concerned about.
The blood pressure is highest in Arteries, beginning from Aorta. It loses pressure when it travels through the Capillaries, which are a bit leaky. It is the lowest at the superior vena cava before it enters the Heart.
She says it takes around 364 pounds of pressure to crush a watermelon and that she even teaches an 8 week Watermelon Crushing Course.
ANY mass hitting the skull with sufficient force can cause the skull to be fractured or even crushed. Yes.
Are coconuts as hard as a human skull?
As we have studied, it takes on average 16 lbs per. square inch to fracture a human skull and on average. 20 lbs per square inch to fracture a coconut.
The appropriate tire pressure for your vehicle's tires can typically be found in the owner's manual or on a sticker located on the driver's side door jamb. In general, 100 PSI would be too high for most passenger car tires, and could cause unsafe driving conditions.
2,000 to 3,000 PSI
Good for cleaning concrete surfaces with light to moderate oil stains, most automotive cleaning, pools, many industrial applications.
Summary: An international team of scientists has created the highest static pressure ever achieved in a lab: Using a special high pressure device, the researchers investigated the behavior of the metal osmium at pressures of up to 770 Gigapascals -- more than twice the pressure in the inner core of the Earth.
American undersea explorer Victor Vescovo has become the first person to dive to the deepest points of the earth's five oceans, and he's now back on dry land to reveal his discoveries.