PSI relative to atmosphere pascal relative to vacuum. How many PSI in 1 pascal? The answer is 0. Note that rounding errors may occur, so always check the results. Type in your own numbers in the form to convert the units!
You can do the reverse unit conversion from pascal to PSI , or enter any two units below:. Considerable changes in the atmospheric pressure cause discomfort for people and animals. The decrease in atmospheric pressure can cause psychological and physical discomfort for people and animals, or even death. For this reason, airplane cabins, which would otherwise experience low air pressure at cruising heights, are artificially pressurized.
Atmospheric pressure decreases with the increase in altitude. People and animals, who live at high altitudes, for example in the Himalayas, adapt to the low pressure. Travelers, on the other hand, often need to take precautionary measures to avoid discomfort.
Some people, such as mountaineers, are affected by altitude sickness, caused by oxygen deficiency in the blood. This condition can become chronic with prolonged exposure. It typically happens at altitudes above 2, meters. In severe cases, people may be affected by high altitude cerebral or pulmonary edema. To prevent altitude-related health problems, medical professionals recommend avoiding depressants such as alcohol and sleeping pills, and also to hydrate well, and ascending to higher altitudes at a slow pace, for example on foot, instead of using transportation.
Additional recommendations include a diet high in carbohydrates, and resting well, especially for individuals who ascended quickly. This will allow the body to combat the oxygen shortage, which results from low atmospheric pressure, by producing more red blood cells to carry oxygen, and by increasing heart and respiratory rates, among other adaptations.
Emergency treatment for severe altitude sickness has to be provided immediately. It is paramount to bring the patient to lower altitudes where the pressure is higher, preferably to an altitude below meters above sea level.
Treatment also includes medication and the use of the Gamow Bag. It is a portable lightweight container that can be pressurized by using a foot pump. The patient is put inside this bag to simulate lower altitudes. This is an emergency treatment and the patient still needs to be transported to lower altitudes.
Low atmospheric pressure is also used by athletes, who sleep in simulated high-altitude environments but exercise in normal conditions.
This helps their bodies to adapt to high altitudes and start producing greater amounts of red blood cells, which, in turn, increases the amount of oxygen carried through their body, and enhances their athletic abilities. For this purpose athletes often use altitude tents or canopies, which have low atmospheric pressure inside.
Astronauts and pilots who have to work at high altitudes use pressure suits to compensate for the low air pressure. Full-pressure suits are used in space, while partial-pressure suits, which provide counter-pressure and assist breathing at high altitudes are used by pilots.
Hydrostatic pressure is the pressure of fluid caused by the force of gravity. It is an important factor not only in engineering and physics, but also in medicine. For example, blood pressure is the hydrostatic pressure of blood on the blood vessel walls.
It usually refers to arterial pressure and is represented by two numbers: systolic or maximum pressure and diastolic or minimum pressure during a heartbeat. The instrument used to measure blood pressure is called a sphygmomanometer. Millimeters of mercury are used as units for blood pressure measurements, even in countries like the USA and the UK, where inches are used for measuring length. A Pythagorean cup is an interesting device, which uses the principles of hydrostatic pressure.
According to legend, it was designed by Pythagoras to moderate wine drinking. Other sources mention that this cup was meant to regulate the drinking of water during a drought. It usually has a stem and always has a dome inside of it, which allows liquid to enter from the bottom through an embedded pipe.
This pipe runs from the bottom of the stem of the cup to the top of the dome, then bends, and opens into the cup, as in the illustration. Liquid enters the pipe through this opening. The other side of the pipe that runs through the stem also has an opening at the bottom of the stem. The design and operating principles of a Pythagorean cup are similar to the ones in modern toilet bowls. If the liquid that fills the cup is above the top of the pipe, then it spills through the bottom of the cup, due to hydrostatic pressure.
If the liquid is below that level, one can use the cup in a conventional way. Pressure is a critical element in geology. The formation of gemstones requires pressure, both for the natural and laboratory-made synthetic gemstones.
Crude oil is also formed by intense pressure and heat from remnants of plants and animals. In contrast to gemstones, which mostly form in rock formations, oil is generally formed in the beds of water such as rivers and seas.
Organic material is covered with sand and silt, which gradually accumulates above it. The weight of the water above and the sand exert pressure. With time, these materials are buried deeper and deeper and reach several kilometers below the Earth's surface.
Depending on the total temperature and temperature fluctuation, gas may be created instead of oil. Gemstone formation varies, but often pressure is an important factor. Diamonds, for example, are created in the mantle of the Earth, where intense pressure and temperatures are present. They then emerge on or near the surface during volcanic eruptions, when magma carries them up.
The Pascal is a small unit when compared with other pressure units, such as the PSI or the bar. The pressure exerted by 1 pound of force spread over an area of 1 square inch is equivalent to 6, Newtons spread over 1 square meter. To convert PSI to bar, remember that a bar is approximately the atmospheric pressure at sea level.
It's equal to That makes 1 bar equal to , Pa. Because the Pascal is so small, it's reserved for low pressure measurements, such as the pressure differences in ventilation systems. Most measurements are easier to quantify by using the kilopascal 10 3 Pa or the megapascal 10 6 Pa. The kilopascal is easiest to use for atmospheric measurements, because it provides for readings in the hundreds.
The megapascal is more appropriate for systems with extremely large pressures, such as hydraulic systems. Since there are 1, Pascals in a kilopascal:.
What is that pressure in bars and in kPa? The atmospheric pressure at the top of Mt. Everest is 4.
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