UNIT CONNECTION TECHNOLOGY CO.,LTD
 
HotLine: free service hotline
86-755-29511413
NEWS News
Hot News / Hot news more
2014 - 04 - 10
点击次数: 332
Important Note: Not recommended for covered spas. We recommend the FT007TP instead (see may we also suggest below).Finally, an easy way to read your water temperature from both indoors and outdoo...
2013 - 11 - 29
点击次数: 178
Simple to read, simple to use, and affordable, the FT007 includes an indoor thermo-hygrometer in the console and can remotely read and update up to eight remote thermo-hygrometer sensors at the same f...
2013 - 11 - 29
点击次数: 73
There are various methods of humidity measurement, most of them using a device called a hygrometer. The hygrometer can work in a variety of ways, depending on the type, and is the most accurate method...
2013 - 12 - 11
点击次数: 94
Author:Admin
2013 - 11 - 29
点击次数: 264
Simple to read, simple to use, and affordable, the FT0073 includes an indoor thermo-hygrometer inside the console, and three remote thermometer-hygrometer sensors (FT007TH), which are all displayed at...
2013 - 11 - 29
点击次数: 62
Indoor humidity levels — the amount of water vapor in the air — can affect the occupants' health and can even affect the furnishings in a home. Indoor humidity comes from a variety of moisture-produci...
Hot News / latest news more
2014 - 04 - 10
点击次数: 332
Important Note: Not recommended for covered spas. We recommend the FT007TP instead (see may we also suggest below).Finally, an easy way to read your water temperature from both indoors and outdoo...
2013 - 11 - 29
点击次数: 77
A clinical thermometer is a device designed to measure human body temperature and determine when a person is running a dangerously high fever or suffering from hypothermia. There are several different...
2013 - 11 - 29
点击次数: 178
Simple to read, simple to use, and affordable, the FT007 includes an indoor thermo-hygrometer in the console and can remotely read and update up to eight remote thermo-hygrometer sensors at the same f...
2013 - 11 - 29
点击次数: 73
There are various methods of humidity measurement, most of them using a device called a hygrometer. The hygrometer can work in a variety of ways, depending on the type, and is the most accurate method...
2013 - 12 - 11
点击次数: 94
Author:Admin
2013 - 11 - 29
点击次数: 264
Simple to read, simple to use, and affordable, the FT0073 includes an indoor thermo-hygrometer inside the console, and three remote thermometer-hygrometer sensors (FT007TH), which are all displayed at...

—— Free service hotline ——

86-755-29511413

Tel:86-755-29511413

Fax:86-755-29511936

5/F., Block J, Shifeng Technology Park, Loucun, Guangming New  District, Shenzhen ,China

sales@uctechnologyltd.com

What Is Air Pressure?

日期: 2017-07-14
浏览次数: 5

Air pressure basically refers to the volume of air in a particular environment, with greater volumes creating higher pressures. On the earth's surface, for example, it is known as "atmospheric pressure" and refers to the weight of the earth's atmosphere pressing down on everything. Changes in pressure can impact the temperature, weather patterns, and cause physiological problems for people and animals. This pressure can even impact the performance of a basketball or similarly inflated object.


Atmospheric Pressure


On the earth, the average air pressure at sea level is 1.03 kilograms per square centimeter (kg/cm2) or 14.7 pounds per square inch (psi); this is commonly measured in bars, in which atmospheric pressure is about 1 bar. This means that hundreds of pounds of pressure are pressing on everyone from all sides, at all times. Humans and other animals are able to survive this pressure because their bodies evolved on the surface where it is natural. If thepressure increases or decreases, it can result in discomfort or even death.


Changes in Pressure and Weather


Atmospheric pressure varies slightly over the earth's surface, and variations in pressure are responsible for various types of weather. Low pressure systems are associated with storms, tornadoes, and hurricanes. Sometimes the air pressure at sea level can drop as low as 870 millibars, which is about 85% of average air pressure. This only happens during the most severe storms. Pressure variations on the earth's surface cause wind: as high pressure air moves toward low pressure areas, creating gusts.


Various Pressures at Different Altitudes


On the top of Mt. Everest, the tallest mountain on earth, the air pressure is just about a third of what it is at sea level. Humans at high altitudes often experience discomfort, such as ear popping, due to differences in their internal and external pressures. At 16 kilometers (km) or almost 10 miles above the surface, slightly higher than the cruising altitude of a typical jet liner, pressure is only 1/10th what it is at sea level. Because low air pressure can be very unpleasant for humans, due to low oxygen content, all areas of aircraft that contain passengers are artificially pressurized. In the event of a rupture in an airplane's fuselage, unsecured items may be "sucked" out of the craft as the high pressure air within it rushes out into the low pressure environment outside.


Higher Altitudes and Outer Space


At 31 km or about 19 miles above the earth's surface, in the stratosphere, the air pressure is only 1/100th what it is at sea level. From this level on, the atmosphere quickly deteriorates into nothingness. Above 100 km or just over 62 miles above the surface, the international definition for outer space, the pressure approaches zero and nearly becomes a vacuum. Humans cannot exist unprotected in such a low-pressure environment.


Other Uses for Pressure


Air pressure is used in a number of commercial applications and consumer products. Pressurized air can be utilized in hydraulic machinery that uses the expansion of air to move different parts. Aerosol canisters use pressurized air to make different chemicals spray out, as the high pressure naturally rushes out into the lower atmospheric pressure when used. Basketballs and similar objects, like tires, are inflated so that they bounce or support other objects. Under-inflation can leave them weakened or less effective, while excess pressurecan cause them to burst or more easily rupture during use.


High-Pressure Settings


Beneath sea level on the earth, pressure becomes increasingly greater. Under the ocean, for example, high pressure in the water can crush a person or object that is designed to withstand the atmospheric pressure of the planet. Special suits and vehicles are needed to withstand such high pressures.


Author:Admin


Hot News / 推荐新闻 +更多+
2014 - 04 - 10
点击次数: 332
Important Note: Not recommended for covered spas. We recommend the FT007TP instead (see may we also suggest below).Finally, an easy way to read your water temperature from both indoors and outdoo...
2013 - 11 - 29
点击次数: 77
A clinical thermometer is a device designed to measure human body temperature and determine when a person is running a dangerously high fever or suffering from hypothermia. There are several different...
2013 - 11 - 29
点击次数: 178
Simple to read, simple to use, and affordable, the FT007 includes an indoor thermo-hygrometer in the console and can remotely read and update up to eight remote thermo-hygrometer sensors at the same f...
2013 - 11 - 29
点击次数: 73
There are various methods of humidity measurement, most of them using a device called a hygrometer. The hygrometer can work in a variety of ways, depending on the type, and is the most accurate method...
2013 - 12 - 11
点击次数: 94
Author:Admin
2013 - 11 - 29
点击次数: 264
Simple to read, simple to use, and affordable, the FT0073 includes an indoor thermo-hygrometer inside the console, and three remote thermometer-hygrometer sensors (FT007TH), which are all displayed at...
2013 - 11 - 29
点击次数: 62
Indoor humidity levels — the amount of water vapor in the air — can affect the occupants' health and can even affect the furnishings in a home. Indoor humidity comes from a variety of moisture-produci...
2013 - 11 - 29
点击次数: 294
FT0021 Ultrasonic water tank lever meter is an inexpensive solution for remotely measuring water tank levels. The sensor works by measuring the time required for an ultrasonic pulse to travel to and f...
2013 - 11 - 29
点击次数: 38
Humidity calibration involves checking the accuracy of and making the proper adjustment to sensors that measure moisture content in the air. Such measurements are critically important in many laborato...
Copyright © 2005 - 2017 Unit Connection Technology Co., Ltd 
犀牛云提供企业云服务
Address:5/F., Block J, Shifeng Technology Park, Loucun, Guangming New District, Shenzhen ,China
Tel:86-755-29511413
Fax:86-755-29511936
Email:sales@uctechnologyltd.com
邮编:330520