Influence of atmospheric pressure on human health. What atmospheric pressure is normal A detailed list of pressure units, one pascal is
Many people are subject to changes in the environment. A third of the population is affected by the attraction of air masses to the earth. Atmospheric pressure: the norm for a person, and how deviations from the indicators affect the general well-being of people.
Changes in the weather can affect the human condition
What atmospheric pressure is considered normal for a person
Atmospheric pressure is the weight of air that presses on the human body. On average, this is 1.033 kg per 1 cubic cm. That is, 10-15 tons of gas control our mass every minute.
The norm of atmospheric pressure is 760 mmHg or 1013.25 mbar. Conditions in which the human body feels comfortable or adapted. In fact, the ideal weather indicator for any inhabitant of the Earth. In reality, everything is not so.
Atmospheric pressure is not stable. Its changes are daily and depend on the weather, relief, level above the sea, climate and even the time of day. Fluctuations are not noticeable to humans. For example, at night, the mercury column rises 1-2 divisions higher. Minor changes do not affect well-being healthy person. Drops of 5-10 or more units are painful, and sharp significant jumps are fatal. For comparison: loss of consciousness from altitude sickness occurs already when the pressure drops by 30 units. That is, at the level of 1000 m above the sea.
A continent and even a separate country can be divided into conditional areas with different norms of average pressure. Therefore, the optimal atmospheric pressure for each person is determined by the region of permanent residence.
High air pressure adversely affects hypertension
Such weather conditions are generous for strokes and heart attacks.
Persons who are vulnerable to the vagaries of nature are advised by doctors on such days to stay outside the zone of active work and deal with the consequences of meteorological dependence.
Meteorological dependence - what to do?
The movement of mercury by more than one division in 3 hours is a reason for stress in a strong organism of a healthy person. Each of us feels such fluctuations in the form of a headache, drowsiness, fatigue. More than a third of people suffer from weather dependence in varying degrees of severity. In the zone of high sensitivity, the population with diseases of the cardiovascular, nervous and respiratory systems, the elderly. How to help yourself if a dangerous cyclone is approaching?
15 Ways to Survive a Weather Cyclone
Not much new advice has been collected here. Together they are believed to alleviate suffering and teach the right way life with meteorological vulnerability:
- See your doctor regularly. Consult, discuss, ask for advice in case of deterioration of health. Have your prescribed medications handy at all times.
- Buy a barometer. It is more productive to track the weather by the movement of the mercury column, rather than knee pain. So you will be able to anticipate the impending cyclone.
- Watch the weather forecast. Forewarned is forearmed.
- On the eve of a change in weather, get enough sleep and go to bed earlier than usual.
- Set up a sleep schedule. Get yourself a full 8-hour sleep, getting up and falling asleep at the same time. This has a powerful restorative effect.
- The meal schedule is equally important. Follow a balanced diet. Potassium, magnesium and calcium are essential minerals. Overeating ban.
- Drink vitamins in a course in spring and autumn.
- Fresh air, walking outside - light and regular exercise strengthens the heart.
- Don't overstress. Postponing household chores is not as dangerous as weakening the body before a cyclone.
- Accumulate favorable emotions. An oppressed emotional background fuels the disease, so smile more often.
- Clothing made of synthetic threads and fur is harmful to static current.
- store folk ways relieving symptoms in a prominent place. The recipe for herbal tea or compress is hard to remember when whiskey ache.
- Office workers in high-rise buildings suffer from weather changes more often. Take a day off if possible, or better yet, change jobs.
- A long cyclone is discomfort for several days. Is it possible to go to a quiet region? Forward.
- Prevention at least a day before the cyclone prepares and strengthens the body. Do not give up!
Don't Forget to Take Vitamins for Health
Atmosphere pressure- This is a phenomenon that is absolutely independent of a person. Moreover, our body obeys him. What should be the optimal pressure for a person determines the region of residence. People with chronic diseases are especially susceptible to meteorological dependence.
About what atmospheric pressure is, we are told at school in the lessons of natural history and geography. We get acquainted with this information and safely throw it out of our heads, rightly believing that we will never be able to use it.
But years later, stress and environmental conditions environment will have an impact on us. And the concept of "geodependence" will no longer seem like nonsense, because pressure surges and headache begin to poison life. At this point, you will have to remember what it is like in Moscow, for example, in order to adapt to new conditions. And live on.
School basics
The atmosphere that surrounds our planet, unfortunately, literally puts pressure on all living and non-living things. To define this phenomenon, there is a term - atmospheric pressure. This is the force of the impact of the air column on the area. In the SI system, we talk about kilograms per 1 square centimeter. Normal atmospheric pressure (for Moscow, optimal indicators have long been known) affects the human body with the same force as a weight weighing 1.033 kg. But most of us don't notice it. Enough gases are dissolved in body fluids to neutralize all unpleasant sensations.
Atmospheric pressure standards in different regions different. But 760 mm Hg is considered ideal. Art. Experiments with mercury were most revealing at a time when scientists were proving that air has weight. Mercury barometers are the most common instruments for measuring pressure. It should also be remembered that ideal conditions, for which the named 760 mm Hg are relevant. Art., is a temperature of 0 ° C and the 45th parallel.
In the international system of units, it is customary to define pressure in Pascals. But for us it is more familiar and understandable to use the fluctuations of the mercury column.
Relief features
Of course, many factors influence the value of atmospheric pressure. The most significant are the relief and proximity to the magnetic poles of the planet. The norm of atmospheric pressure in Moscow is fundamentally different from the indicators of the same St. Petersburg; and for the inhabitants of some remote village in the mountains, this figure may seem completely anomalous. Already at the level of 1 km above sea level It corresponds to 734 mm Hg. Art.
As already noted, in the region of the earth's poles, the amplitude of pressure changes is much higher than in the equatorial zone. Even during the day, atmospheric pressure changes somewhat. Slightly, however, only 1-2 mm. This is due to the difference between day and night temperatures. The nights are usually cooler, which means the pressure is higher.
pressure and man
For a person, in essence, it does not matter what atmospheric pressure is: normal, low and high. These are very arbitrary definitions. People tend to get used to everything and adapt. Much more important is the dynamics and magnitude of changes in atmospheric pressure. There are quite a lot of zones on the territory of the CIS countries, in particular in Russia. Often, local residents do not even know about it.
The norm of atmospheric pressure in Moscow, for example, may well be considered as a non-constant value. After all, every skyscraper is a kind of mountain, and the higher and faster you go up (go down), the more noticeable the drop will be. Some people may well pass out while riding a high-speed elevator.
Adaptation
Doctors almost unanimously agree that the question "what atmospheric pressure is considered normal" (Moscow or any locality planets - it doesn't matter) is incorrect in itself. Our body adapts perfectly to life above or below sea level. And if the pressure does not have a detrimental effect on a person, it can be considered normal for a given area. Doctors say that the norm of atmospheric pressure in Moscow and other major cities is in the range from 750 to 765 mm Hg. pillar.
A completely different matter is the pressure drop. If within a few hours it rises (falls) by 5-6 mm, people begin to experience discomfort and pain. This is especially dangerous for the heart. Its beat becomes more frequent, and a change in the frequency of breaths leads to a change in the rhythm of oxygen supply to the body. The most common ailments in such a situation are weakness, etc.
Meteorological dependence
Normal atmospheric pressure for Moscow may seem like a nightmare to a visitor from the North or from the Urals. After all, each region has its own norm and, accordingly, its own understanding of the stable state of the body. And since in life we do not concentrate on exact pressure indicators, weather forecasters always focus on what kind of pressure it is for a given region - increased or decreased.
After all, not every person can boast that he does not notice the corresponding changes. Anyone who cannot call himself lucky in this matter must systematize his feelings during pressure drops and find acceptable countermeasures. Often a cup of strong coffee or tea is enough, but sometimes more serious help in the form of medicines is also needed.
pressure in the metropolis
The most meteorologically dependent are residents of megacities. It is here that a person experiences more stress, lives life at a high pace and experiences environmental degradation. Therefore, to know what is the norm of atmospheric pressure for Moscow is vital.
The capital of the Russian Federation is located on the Central Russian Upland, which means that here, a priori, the zone reduced pressure. Why? It's very simple: the higher above sea level, the lower the atmospheric pressure. For example, on the banks of the Moskva River, this figure will be 168 m. And the maximum value in the city was recorded in Teply Stan - 255 m above sea level.
It can be assumed that Muscovites expect abnormally low atmospheric pressure much less frequently than residents of other regions, which, of course, cannot but rejoice them. And yet, what atmospheric pressure is considered the norm in Moscow? Meteorologists say that usually its indicator does not exceed 748 mm Hg. pillar. This means little, because we already know that even a quick rise in an elevator can have a significant effect on a person's heart.
On the other hand, Muscovites do not feel uncomfortable if the pressure fluctuates between 745-755 mm Hg. Art.
Danger
But from the point of view of doctors, not everything is so optimistic for the residents of the metropolis. Many experts rightly believe that working on the upper floors of business centers, people endanger themselves. Indeed, in addition to the fact that they live in a zone of low pressure, they also spend almost a third of the day in places with
If we add to this fact violations of the ventilation system of the building and permanent job air conditioners, it becomes obvious that the employees of such offices are the most inefficient, sleepy and sick.
Results
Actually, it is worth remembering a few points. First, there is no single ideal value for normal atmospheric pressure. There are regional norms that can differ significantly in absolute terms. Secondly, the characteristics of the human body make it easy to experience pressure drops if this happens rather slowly. Thirdly, the healthier we lead and the more often we manage to observe the daily regimen (getting up at the same time, a long night's sleep, following an elementary diet, etc.), the less we are subject to meteorological dependence. So, more energetic and cheerful.
Man is far from being the king of nature, but rather her child, an integral part of the universe. We live in a world where everything is strictly interconnected and subject to a single system.
Everyone knows that the Earth is surrounded by a dense air mass, which is commonly called the atmosphere. And any object, including the human body, is “pressed” by an air column that has a certain weight. Scientists empirically managed to establish that for every square centimeter human body Atmospheric pressure weighs 1.033 kilograms. And if you carry out simple mathematical calculations, it turns out that on average a person is under pressure of 15550 kg.
The weight is colossal, but, fortunately, completely imperceptible. Perhaps this is due to the presence of dissolved oxygen in human blood.
What is the effect of atmospheric pressure on a person? A little more about this.
Atmospheric pressure norm
Doctors, in a conversation about what atmospheric pressure is considered normal, indicate a range of 750 ... .760 mm Hg. Such a spread is quite acceptable, since the relief of the planet is not perfectly even.
Meteorological dependence
Doctors say that the body of some people is able to adapt to any conditions. They do not care even for such serious tests as long-distance flights by plane from one climate zone in another.
At the same time, others, without leaving their apartment, feel the approach of changes in the weather. This can manifest itself in the form of severe headaches, inexplicable weakness, or constantly wet palms, for example. Such people are more likely to be diagnosed with diseases of the vessels and the endocrine system.
It is especially difficult when atmospheric pressure makes a sharp jump for a short time. According to statistics, most of the people whose body reacts so violently to changes in atmospheric pressure indicators are women living in large cities. Unfortunately, the rigid rhythm of life, overcrowding, ecology are not the best companions of health.
You can get rid of addiction if you want. You just need to be persistent and consistent. Everyone knows the methods. These are the basics healthy lifestyle life: hardening, swimming, walking-running, healthy eating, adequate sleep, elimination bad habits, weight loss.
How does our body react to increased atmospheric pressure?
Atmospheric pressure (norm for a person) - ideally 760 mm Hg. But such an indicator is very rarely kept.
As a result of the increase in pressure in the atmosphere, clear weather, there are no sudden changes in humidity and air temperature. The body of hypertensive patients and allergy sufferers actively reacts to such changes.
In the conditions of the city, in calm weather, naturally, gas pollution makes itself felt. The first to feel this are patients who have a problem with the respiratory organs.
An increase in atmospheric pressure also affects the immune system. Specifically, this is expressed in a decrease in leukocytes in the blood. It will not be easy for a weakened body to cope with infections.
Doctors advise:
Start your day light morning exercises. Take a contrast shower. For breakfast, give preference to foods that are high in potassium (cottage cheese, raisins, dried apricots, bananas). Don't allow yourself to eat too much. Don't overeat. This day is not the most successful for great physical effort and the manifestation of emotions. Arriving home, rest for an hour, do routine household chores, go to bed earlier than usual.
Low atmospheric pressure and well-being
Low atmospheric pressure, how much is it? Answering the question, we can conditionally say if the barometer reading is lower than 750 mm Hg. But it all depends on where you live. In particular, for Moscow, indicators of 748-749 mm Hg. are the norm.
Among the first to feel this deviation from the norm are “cores” and those who have intracranial pressure. They complain about general weakness, frequent migraines, lack of oxygen, shortness of breath, as well as pain in the intestines.
Doctors advise:
Bring your blood pressure back to normal. reduce physical activity. Include ten minutes of rest in every working hour. Drink more liquid, preferring green tea with honey. Drink Morning coffee. Take herbal tinctures indicated for cores. Relax in the evenings under a contrast shower. Go to bed earlier than usual.
How changes in humidity affect the body
Low air humidity of 30 - 40 percent is not useful. It irritates the nasal mucosa. Asthmatics and allergy sufferers are the first to feel this deviation. In this case, moisturizing the mucous membrane of the nasopharynx with a slightly salty aqueous solution can help.
Frequent precipitation naturally raises the air humidity to 70-90 percent. It also negatively affects health.
High air humidity can exacerbate chronic diseases of the kidneys and joints.
Doctors advise:
Change the climate, if possible, to dry. Reduce your time outdoors in wet weather. Go for a walk in warm clothes. Remember vitamins
Atmospheric pressure and temperature
The optimum temperature for a person in a room is not higher than +18. This is especially true for the bedroom.
How is the mutual influence of atmospheric pressure and oxygen formed?
In the case of an increase in air temperature and a simultaneous decrease in atmospheric pressure, people with diseases of the cardiovascular and respiratory organs suffer.
If the temperature drops and atmospheric pressure rises, it becomes bad for hypertensive patients, asthmatics and those who have problems with the stomach and genitourinary system.
In the event of a sharp and repeated fluctuation in temperature in the body, an unacceptably a large number of histamine, the main provocateur of allergies.
Good to know
What is the normal atmospheric pressure for a person, now you know. This is 760 mm Hg, but the barometer records such indicators very rarely.
It is also important to remember that the change in atmospheric pressure with height (while it rapidly decreases) occurs quite sharply. It is because of such a drop that a person climbing a mountain very quickly can lose consciousness.
In Russia, atmospheric pressure is measured in mm Hg. But the international system takes pascals as a unit of measurement. In this case, the normal atmospheric pressure in pascals will be equal to 100 kPa. If we convert our 760 mm Hg. in pascals, then the normal atmospheric pressure in pascals for our country will be 101.3 kPa.
Pascal (Pa, Pa)
Bar (bar, bar) is approximately equal to one atmosphere.
One bar is equal to 105 N/m² or 106 dynes/cm² or 0.986923 atm.
Also used millibar
PSI (lb.p.sq.in.)
millimeter of water column inch of mercury (inHg)
micron (micron,μ )
| Pascal | Bar | technical atmosphere | physical atmosphere | millimeter of mercury | Pound-force per square inch | Micron | inch of mercury | |
|---|---|---|---|---|---|---|---|---|
| (Pa, Pa) | (bar, bar) | (at, at) | (atm, atm) | (mmHg, torr, torr) | (psi) | (μκ, micron) | ("Hg, inHg) | |
| 1 Pa | 1 N m2 | 10-5 | 10.197 10-6 | 9.8692 10-6 | 7.5006 10-6 | 145.04 10-6 | 7,5 | 29.53 10-5 |
| 1 bar | 105 | 1 106 dynes/cm2 | 1,0197 | 0,98692 | 750,06 | 14,504 | 7.5 105 | 2,953 |
| 1 at | 98066,5 | 0,980665 | 1 kgf/cm2 | 0,96784 | 735,56 | 14,223 | 7.356 105 | 28,96 |
| 1 atm | 101325 | 1,01325 | 1,033 | 1 atm | 760 | 14,696 | 7.6 105 | 29,9222 |
| 1 mmHg | 133,322 | 1.3332 10-3 | 1.3595 10-3 | 1.3158 10-3 | 1 mmHg | 19.337 10-3 | 1000 | 39.37 10-3 |
| 1psi | 6894,76 | 68.948 10-3 | 70.307 10-3 | 68.046 10-3 | 51,715 | 1lbf/in2 | 5.171 104 | 0,2036 |
| 1 micron | 0,1333 | 1.333 10-6 | 1.3595 10-6 | 1.3158 10-6 | 10-3 | 19.337 10-6 | 1 μκ | 39.37 10-6 |
| 1"Hg | 3.386 103 | 0,33864 | 34.531 10-3 | 33.42 10-3 | 25,4 | 4,9116 | 25.4 103 | 1 inHg |
Alexey Matveev,
You will need
- - calculator;
- - a computer;
- - the Internet.
Instruction
- When converting pressure to pascals, keep in mind that when measuring blood pressure, in meteorological reports, as well as among vacuum engineers, the name “mm Hg” is often abbreviated. Art. " to "mm" (sometimes millimeters are omitted). Therefore, if the pressure is given in millimeters or just a number, then most likely it is mm Hg. Art. (please specify if possible). When measuring very low pressures, instead of mm Hg. Art. "vacuum workers" use the unit "micron of mercury", which is usually referred to as "μm". Accordingly, if the pressure is indicated in microns, then simply divide this number by a thousand and get the pressure in mmHg. Art.
- When measuring high pressures often used such a unit as "atmosphere", corresponding to normal atmospheric pressure.
millimeter of mercury
One atmosphere (atm, atm) is equal to 760 mm Hg. Art. That is, to obtain pressure in mm Hg. Art. multiply the number of atmospheres by 760. If the pressure is indicated in "technical atmospheres", then to convert the pressure to mmHg. Art. multiply this number by 735.56.
- Example.
505400 Pa (or 505.4 kPa).
CompleteRepair.Ru
When installing the air conditioner, it is necessary to measure the pressure in the system. Gauges use different units of pressure measurement, which, in turn, may differ from those indicated in technical specifications the air conditioner itself. How to avoid confusion in this diversity?
To help novice installers below is given short description various pressure units.
Pascal (Pa, Pa) is equal to the pressure of a force of one newton per one square meter.
Bar (bar, bar)
Also used millibar(mbar, mbar), 1 mbar = 0.001 bar.
Technical atmosphere (at, at)- equal to a pressure of 1 kgf per 1 cm².
Atmosphere standard, physical (atm, atm)- equal to 101,325 Pa and 760 millimeters of mercury.
PSI (lb.p.sq.in.)- pound-force per square inch (English pound-force per square inch, lbf / in²) is equal to 6,894.75729 Pa.
Millimeter of mercury (mm Hg, mm Hg, Torr, Torr)- equal to 133.3223684 Pa. Also used millimeter of water column(1 mm Hg = 13.5951 mm water column) and inch of mercury (inHg).
millimeter of mercury to pascal
1 inHg = 3.386389 kPa at 0°C.
micron (micron,μ ) - equal to 0.001 mm Hg. Art. (0.001 Torr).
Pressure units conversion table:
| Pascal | Bar | technical atmosphere | physical atmosphere | millimeter of mercury | Pound-force per square inch | Micron | inch of mercury | |
|---|---|---|---|---|---|---|---|---|
| (Pa, Pa) | (bar, bar) | (at, at) | (atm, atm) | (mmHg, torr, torr) | (psi) | (μκ, micron) | ("Hg, inHg) | |
| 1 Pa | 1 N m2 | 10-5 | 10.197 10-6 | 9.8692 10-6 | 7.5006 10-6 | 145.04 10-6 | 7,5 | 29.53 10-5 |
| 1 bar | 105 | 1 106 dynes/cm2 | 1,0197 | 0,98692 | 750,06 | 14,504 | 7.5 105 | 2,953 |
| 1 at | 98066,5 | 0,980665 | 1 kgf/cm2 | 0,96784 | 735,56 | 14,223 | 7.356 105 | 28,96 |
| 1 atm | 101325 | 1,01325 | 1,033 | 1 atm | 760 | 14,696 | 7.6 105 | 29,9222 |
| 1 mmHg | 133,322 | 1.3332 10-3 | 1.3595 10-3 | 1.3158 10-3 | 1 mmHg | 19.337 10-3 | 1000 | 39.37 10-3 |
| 1psi | 6894,76 | 68.948 10-3 | 70.307 10-3 | 68.046 10-3 | 51,715 | 1lbf/in2 | 5.171 104 | 0,2036 |
| 1 micron | 0,1333 | 1.333 10-6 | 1.3595 10-6 | 1.3158 10-6 | 10-3 | 19.337 10-6 | 1 μκ | 39.37 10-6 |
| 1"Hg | 3.386 103 | 0,33864 | 34.531 10-3 | 33.42 10-3 | 25,4 | 4,9116 | 25.4 103 | 1 inHg |
Alexey Matveev,
technical specialist of the Raskhodka company
In order to find out how many atmospheres are in a millimeter of a mercury column, you need to use a simple online calculator. Enter in the left field the number of millimeters of mercury you are interested in that you want to convert. In the field on the right you will see the result of the calculation. If you need to convert millimeters of mercury or atmosphere to other units, just click on the appropriate link.
What is "millimeter of mercury"
The non-systemic unit millimeter of mercury (mm Hg; mm Hg), sometimes called "torr", is equal to 101 325 / 760 ≈ 133.322 368 4 Pa. Atmospheric pressure was measured with a barometer with a column of mercury, hence the name of this unit of measurement. At sea level, atmospheric pressure is approximately 760 mm Hg. Art. or 101 325 Pa, hence the value - 101 325/760 Pa. This unit is traditionally used in vacuum technology, in measuring blood pressure and in weather reports. In some instruments, measurements are made in millimeters of water column (1 mmHg = 13.5951 mmHg), and in the USA and Canada, there is also an “inch of mercury” (inHg) = 3.386389 kPa at 0 ° C.
What is "atmosphere"
A non-systemic unit of pressure that approximates atmospheric pressure at world sea level. Equally, there are two units - the technical atmosphere (at, at) and the normal, standard or physical atmosphere (atm, atm). One technical atmosphere is a uniform perpendicular pressure of a force of 1 kgf on flat surface with an area of 1 cm². 1 at = 98,066.5 Pa.
Pressure Calculator
The standard atmosphere is the pressure of a 760 mm high mercury column at a mercury density of 13,595.04 kg/m³ and zero temperature. 1 atm = 101 325 Pa = 1.033233 at. In the Russian Federation, only the technical atmosphere is used.
In the past for the absolute and overpressure used the terms "ata" and "ati". Gauge pressure is the difference between absolute and atmospheric pressure when absolute is greater than atmospheric pressure. The difference between atmospheric and absolute pressure, when the absolute pressure is lower than atmospheric pressure, is called rarefaction (vacuum).
Millimeters of mercury and pascals are used to measure pressure. Although the pascal is the official system unit, non-systemic millimeters of mercury are in no way inferior to them in their prevalence. "Millimeters" even have their own name - "torr" (torr), given in honor of the famous scientist Torricelli. Between the two units there is an exact relationship: 1 mm Hg. Art. \u003d 101325 / 760 Pa, which is the definition of the unit “mm Hg. Art.
You will need
- - calculator;
- - a computer;
- - the Internet.
Instruction
- To convert the pressure given in millimeters of mercury to pascals, multiply the number of mmHg. Art. by the number 101325, and then divide by 760. That is, use the simple formula: Kp \u003d Km * 101325 / 760, where:
Km - pressure in millimeters of mercury (mm Hg, mm Hg, torr., torr)
Kp - pressure in pascals (Pa, Ra). - Using the formula above gives the closest match between the two measurement systems. For practical calculations, use a simpler formula: Kp \u003d Km * 133.322 or simply Kp \u003d Km * 133.
- When converting pressure to pascals, keep in mind that when measuring blood pressure, in meteorological reports, as well as among vacuum engineers, the name “mm Hg” is often abbreviated. Art. " to "mm" (sometimes millimeters are omitted). Therefore, if the pressure is given in millimeters or just a number, then most likely it is mm Hg. Art. (please specify if possible).
How to convert Pa to mm. rt. Art.?
When measuring very low pressures, instead of mm Hg. Art. "vacuum workers" use the unit "micron of mercury", which is usually referred to as "μm". Accordingly, if the pressure is indicated in microns, then simply divide this number by a thousand and get the pressure in mmHg. Art.
- When measuring high pressures, the unit often used is "atmosphere", which corresponds to normal atmospheric pressure. One atmosphere (atm, atm) is equal to 760 mm Hg. Art. That is, to obtain pressure in mm Hg. Art. multiply the number of atmospheres by 760. If the pressure is indicated in "technical atmospheres", then to convert the pressure to mmHg. Art. multiply this number by 735.56.
- Example.
The pressure in a car tire is 5 atmospheres. What will this pressure be equal to, expressed in Pascals? Solution.
Convert pressure from atmospheres to mm Hg. st.: 5 * 760 = 3800.
Convert pressure from mmHg. Art. in pascals: 3800 * 133 = 505400. Answer.
505400 Pa (or 505.4 kPa). - If you have a computer or mobile phone with Internet access, then just find any online service for converting physical units of measurement. To do this, type in a search engine a phrase like “translate from mmHg to Pascals” and follow the instructions on the service website.
CompleteRepair.Ru
Convert pascals to millimeters of mercury
When installing the air conditioner, it is necessary to measure the pressure in the system. Pressure gauges use different pressure units, which, in turn, may differ from those indicated in the technical specifications of the air conditioner itself. How to avoid confusion in this diversity?
To help beginner installers, below is a brief description of the various pressure units.
Pascal (Pa, Pa)- is equal to the pressure of a force of one newton per square meter.
Bar (bar, bar) is approximately equal to one atmosphere. One bar is equal to 105 N/m² or 106 dynes/cm² or 0.986923 atm.
Also used millibar(mbar, mbar), 1 mbar = 0.001 bar.
Technical atmosphere (at, at)- equal to a pressure of 1 kgf per 1 cm².
Atmosphere standard, physical (atm, atm)- equal to 101,325 Pa and 760 millimeters of mercury.
PSI (lb.p.sq.in.)- pound-force per square inch (English pound-force per square inch, lbf / in²) is equal to 6,894.75729 Pa.
Millimeter of mercury (mm Hg, mm Hg, Torr, Torr)- equal to 133.3223684 Pa. Also used millimeter of water column(1 mm Hg = 13.5951 mm water column) and inch of mercury (inHg). 1 inHg = 3.386389 kPa at 0°C.
micron (micron,μ ) - equal to 0.001 mm Hg. Art. (0.001 Torr).
Pressure units conversion table:
| Pascal | Bar | technical atmosphere | physical atmosphere | millimeter of mercury | Pound-force per square inch | Micron | inch of mercury | |
|---|---|---|---|---|---|---|---|---|
| (Pa, Pa) | (bar, bar) | (at, at) | (atm, atm) | (mmHg, torr, torr) | (psi) | (μκ, micron) | ("Hg, inHg) | |
| 1 Pa | 1 N m2 | 10-5 | 10.197 10-6 | 9.8692 10-6 | 7.5006 10-6 | 145.04 10-6 | 7,5 | 29.53 10-5 |
| 1 bar | 105 | 1 106 dynes/cm2 | 1,0197 | 0,98692 | 750,06 | 14,504 | 7.5 105 | 2,953 |
| 1 at | 98066,5 | 0,980665 | 1 kgf/cm2 | 0,96784 | 735,56 | 14,223 | 7.356 105 | 28,96 |
| 1 atm | 101325 | 1,01325 | 1,033 | 1 atm | 760 | 14,696 | 7.6 105 | 29,9222 |
| 1 mmHg | 133,322 | 1.3332 10-3 | 1.3595 10-3 | 1.3158 10-3 | 1 mmHg | 19.337 10-3 | 1000 | 39.37 10-3 |
| 1psi | 6894,76 | 68.948 10-3 | 70.307 10-3 | 68.046 10-3 | 51,715 | 1lbf/in2 | 5.171 104 | 0,2036 |
| 1 micron | 0,1333 | 1.333 10-6 | 1.3595 10-6 | 1.3158 10-6 | 10-3 | 19.337 10-6 | 1 μκ | 39.37 10-6 |
| 1"Hg | 3.386 103 | 0,33864 | 34.531 10-3 | 33.42 10-3 | 25,4 | 4,9116 | 25.4 103 | 1 inHg |
Alexey Matveev,
technical specialist of the Raskhodka company
Pressure- this is physical quantity showing acting force per unit area of a surface perpendicular to that surface.
Pressure is defined as P = F / S, where P is pressure, F is pressure force, S is surface area. From this formula it can be seen that the pressure depends on the surface area of the body acting with a certain force. How less area surface, the greater the pressure.
The unit of pressure is newton per square meter (N/m2). We can also convert pressure units N/m2 to pascals, units of measurement named after the French scientist Blaise Pascal, who developed the so-called Pascal's Law. 1 N/m2 = 1 Pa.
What???
Pressure of gases and liquids - manometer, differential pressure gauge, vacuum meter, pressure sensor.
Atmospheric pressure - barometer.
Blood pressure - tonometer.
And so, once again, pressure is defined as P = F / S. The force in the gravitational field is equal to weight - F = m * g, where m is the mass of the body; g - acceleration free fall. Then the pressure is
P = m * g / S. Using this formula, you can determine the pressure exerted by the body on the surface. For example, a person on the ground.
Atmospheric pressure decreases with height. The dependence of atmospheric pressure on altitude is determined by the barometric formula -
P = Po*exp(-µgh/RT). Where, μ = 0.029 kg/m3 is the molecular weight of the gas (air); g = 9.81 m/s2 is the free fall acceleration; h - ho - the difference between the height above sea level and the height taken at the beginning of the report (h=ho); R = 8.31 - J/mol K - gas constant; Ro - atmospheric pressure at a height taken as the reference point; T is the temperature in Kelvin.
It has been experimentally established that atmospheric pressure at sea level is approximately 760 mm Hg. Art. The standard atmospheric pressure is assumed to be 760 mm Hg. Art., or 101 325 Pa, hence the definition of a millimeter of mercury 101 325/760 Pa = 133.322 368, i.e. 1 mmHg Art. = 133.322 Pa.
mercury mercury(Russian Mark: mmHg mmHg
St.; international: mmHg Art.) is a non-systematic pressure measurement unit equal to 101 325/760 ≈ 133.32 368 4 Pa; sometimes called "Thor"(Russian tag - torr, International - Torr) in honor of the evangelists Torricelli.
In the Russian Federation, it is allowed to use a millimeter of mercury as outsourcing without limiting the duration of "medicine, meteorology, aviation" .
The International Organization of Legal Metrology (OIML) in its recommendation applies the millimeter of mercury to units of measurement "which may be provisionally used before the date specified in national regulations, but cannot be determined if they are not used".
The source of this device is connected to a method of measuring atmospheric pressure using a barometer, in which the pressure is controlled by a liquid column. Liquid mercury is widely used because it has a very high density(≈13,600 kg/m3), which reduces the required liquid column height and low pressure steam at room temperature.
Atmospheric pressure in the sea is about 760 mm Hg. The standard atmospheric pressure is assumed to be (exactly) 760 mmHg. Art. Or 101 325 Pa, so the definition of a millimeter of mercury (101 325/760 Pa) is assumed. Previously, a slightly different definition was used: the height of a mercury column is 1 mm and the density is 13.5951 x 103 kg / m³, the free fall acceleration is 9.806 65 m / s².
The difference between these two definitions is 0.000014%.
Pressure: a little history and units of measurement
Millimeters of mercury are used, for example, in vacuum engineering, meteorological reports, and blood pressure measurements. Because vacuum engineering is often pressure measured in millimeters, we simply omit the word "Hg" for the physical transition in micrometer (micron) vacuum systems, typically without "Hg" pressure.
When Vacuum pump shows a pressure of 25 microns, this is the last vacuum created by this pump, measured in microns of the mercury column. Of course, no one uses a Torricelli gauge to measure such low pressures.
Use other instruments such as a McLeod gauge (vacuum gauge) to measure low pressure.
Sometimes millimeters of water (1 mmHg = 13,5951 mm of water.). The United States and Canada also use the "v. Hg" (inHg). 1 inches of mercury = 3386389 kPa at 0 °C
| 1 N/m² | 10-5 | 10.197 10-6 | 9.8692 10-6 | 7,500 10-3 | 1.0197 10-4 | 145.04 10-6 |
| 105 | 1 106 dynes/cm² | 1,0197 | 0,98692 | 750,06 | 10197 | 14,504 |
| 98066,5 | 0.980665 | 1 kgf / cm² | 0,96784 | 735,56 | 10 | 14223 |
| 101325 | 1,01325 | 1033 | 1 atm | 760 | 10:33 | 14,696 |
| 133,322 | 1.3332 10-3 | 1.3595 10-3 | 1.3158 10-3 | 1 mmHg Art. | 13.595 10-3 | 19.337 10-3 |
| 9806,65 | 9 80665 10-2 | 0,1 | 0.096784 | 73556 | 1 m of water. Art. | 1,4223 |
| 6894,76 | 68 948 10-3 | 70.307 10-3 | 68 046 10-3 | 51,715 | 0,70307 | 1 lb/in² |
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To find out how many millimeters of mercury are in the atmosphere, you need to use a simple web calculator. Enter the number of millimeters of mercury you want to change in the left box. In the field on the right you will see the result of the calculation.
If you need to convert millimeters to mercury or other atmospheric units, click on the appropriate link.
What is "millimeter mercury"
Additional system millimeter of mercury (mmHg)
R. mmHg Art.), sometimes called "torr", is equal to 101 325/760 ≈ 133 322 368 4 Pa. Atmospheric pressure was measured with a mercury barometer, hence the name of this unit of measure. At sea level, atmospheric pressure is approximately 760 mm Hg. Art. or 101 325 Pa, so the value is 101 325/760 Pa. This device is traditionally used in vacuum technology, blood pressure measurements and weather reporting.
Unit converter
Some instruments measure millimeters of water (1 mmHg, V = 13951 mm of water, V.) and "Hg" (Hg) = 3.386389 kPa at 0° found in the United States and Canada C .
What is "atmosphere"
A non-systematic pressure measurement unit that approximates atmospheric pressure at global sea level.
In addition, two units are the technical atmosphere (at, at) and the normal, standard or physical atmosphere (atm, atm). One technical atmosphere is a single perpendicular force of 1 kg of force on a flat surface of 1 cm2.
1 at. = 98.066.5 Pa. The standard atmosphere is a 760 mm mercury column with a mercury density of 13,595.04 kg/m³ and zero temperature.
1 atm = 101 325 Pa = 1.0323233 at. Russian Federation uses only the technical atmosphere.
In the past, the terms "ata" and "ati" were used for absolute and gauge pressure. Overpressure is the difference between absolute and atmospheric pressure when the absolute is greater than atmospheric pressure.
The difference between atmospheric and absolute pressure, when the absolute pressure is lower than atmospheric pressure, is called vacuum (vacuum).
The definition of atmospheric pressure is very simple - it is Atmosphere pressure that is in it and on the surface of the planet. In other words, atmospheric pressure is the pressure of one column, which is on top, with an area of 1 square meter.
Atmospheric pressure measurement
The pressure units are pascal, rods and millimeters of mercury. The latter is used in barometers (special measuring instruments) and understandable ordinary people, as many people use barometers.
Many people know that 760 mm of mercury normal pressure(this is the atmospheric pressure at sea, since it is accepted as the norm). Just add that it's ok at 0°C.
Another popular unit of measurement that is often used in physics is the pascal. The value 101325 Pa is called normal pressure and corresponds to 760 mm of mercury.
Well, the last unit of measure is the bat.
1 bar = 100,000 Pa. In this case, the normal pressure is 1.01325 bar.
Has anyone heard the expression one atmosphere or three atmospheres, for example?
mercury mercury
Thus, the atmosphere in this case is called normal pressure (which we talked about above). But a pressure equal to three atmospheres cannot be called normal, since it is three times higher than normal.
To simplify the calculation, in the concept of chemistry standard atmospheric pressure.
This is almost the same as normal - 100,000 Pa (100 kPa) or 1 bar.
Man is far from being the king of nature, but her child, an integral part of the universe. We live in a world where everything is strictly interconnected and subject to one single system.
Everyone knows that the Earth is surrounded by a dense air mass, which is usually called the atmosphere. And on every object, including the human body, it “compresses” an air column that has a certain weight. Scientists experimentally found that every square centimeter of the human body is affected by atmospheric pressure weighing 1033 kilograms.
And if you do simple mathematical calculations, it turns out that the average person is under pressure of 15550 kg.
The weight is huge, but thankfully it's completely insensitive. Perhaps this is due to the fact that dissolved oxygen exists in human blood.
What is the effect of atmospheric pressure on a person? A little more about this.
Atmospheric pressure norm
Doctors who talk about what atmospheric pressure is considered normal show a range of 750 ... 760 mm Hg.
Such a distribution is quite acceptable, since the relief of the planet is not entirely uniform.
Meteorological dependence
Doctors say that some people's bodies can adapt to all conditions.
Even such serious tests as long-distance flights from one climate zone to another, not for them at all.
At the same time, others who do not leave their homes feel the approach of weather changes. This can come in the form of severe headaches, unexplained weakness, or constantly wet hands, for example.
These people are more likely to have vascular and endocrine disorders than others.
It is especially difficult if the atmospheric pressure is jump for a short time. According to statistics, most of the people whose body reacts so strongly to changes in atmospheric pressure are women living in large cities.
Unfortunately, the rigid rhythm of life, overpopulation, ecology are not the best followers of health.
If you want, you can get rid of the addiction. Just keep going and constantly have to be. Methods are known to all. This is the basis of a healthy lifestyle: hardening, swimming, walking, running, healthy eating, adequate sleep, elimination of bad habits, weight loss.
How does our body react to increased atmospheric pressure?
Atmospheric pressure (standard for humans) is an ideal 760 mm Hg. But this indicator is very rare.
Due to the increase in atmospheric pressure, clear weather conditions, there are no sharp changes in humidity and air temperature. Such changes actively respond to the body of hypertension and allergies.
In a situation in the city, without wind, it is natural to pollute the gas.
First, patients with respiratory diseases.
An increase in atmospheric pressure also affects the immune system.
Conversion of millimeters of mercury to the atmosphere
This is reflected in the decrease in leukocytes in the blood. A weakened body will not easily control infections.
Doctors advise:
Start your day with light morning exercises. Take a contrast shower. For breakfast, give priority to foods that contain a lot of potassium (cottage cheese, raisins, dried apricots, bananas). Don't allow more food.
Do not eat. This day is not the most successful for great physical effort and emotions. When you get home, take a break from one hour, do your usual homework, leave early.
Low atmospheric pressure and good health
Low atmospheric pressure, that's how much? You can answer the conditional question if the barometer reading is less than 750 mm.st. But it all depends on where you live.
Especially for Moscow, the figures are 748-749 mm Hg. are the norm.
Among the first, I think it is an aberration of the "core" and those with intracranial pressure. Complaints in general are nausea, frequent migraines, lack of oxygen, shortness of breath and pain in the intestines.
Doctors advise:
Get your blood pressure back to normal.
Reduce physical activity. Every working hour brings ten minutes of rest. Drink fluids more often green tea with honey. Drink your morning coffee. Take the herbal tinctures indicated for sails. Relax in the evening under a contrast shower. Go to bed before your usual hour.
How changes in humidity affect your body
Low humidity of 30-40% is not useful. This irritates the nasal mucosa. First, these abnormalities are the first, asthma and allergies.
To help in this case, the nosopharynx mucosa can be moistened with a slightly saline aqueous solution.
Frequent precipitation, of course, increases the humidity of the air to 70-90 percent. It also provides Negative influence on health.
High humidity can cause worsening of chronic kidney and joint diseases.
Doctors advise:
If possible, change the climate to dry. Reduce holding time in wet weather. Go for a walk in warm clothes. Remember vitamins
Atmospheric pressure and temperature
The optimum temperature for a person in a room is not higher than +18.
This is especially true for the bedroom.
How does the interaction between atmospheric pressure and oxygen develop?
In the case of an increase in air temperature and a simultaneous decrease in atmospheric pressure, people suffering from diseases of the cardiovascular and respiratory organs suffer.
If the temperature drops and atmospheric pressure rises, it becomes bad for hypertensives, asthmatics, and patients with stomach and genitourinary problems.
In the case of sharp and multiple fluctuations in temperature, an unbearably large amount of histamine, the main pathogen that causes allergies, is formed in the body.
Good to know
What is normal atmospheric pressure for a person you know now?
This is 760 mm Hg. St., but such barometers are very rare.
It is also important to know that the change in atmospheric pressure with height (during a rapid descent) is quite dramatic. Because of this difference, a person who quickly climbs a mountain can lose consciousness.
In Russia, atmospheric pressure is measured in mm Hg. Art. But international system has its own unit of measure, the pascal.
At the same time, the normal atmospheric pressure in pascals will be 100 kPa. If you convert our 760mmHg. in Pascal, the normal atmospheric pressure in Pascals for our country will be 101.3 kPa.
