| Analysis of the search query | why is atmospheric pressure lower at high altitudes |
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Top competitors on query "why is atmospheric pressure lower at high altitudes"
Effects of Pressure and Density Altitude on Aircraft Performance
http://www.experimentalaircraft.info/flight-planning/aircraft-performance-3.php Competition: low
For example, aircraft all up weight is something we can do about but air density depends on more factors, as we will see, and most of them we can not influence at all. International Standard Atmosphere A standard atmosphere has been established to enable comparison of aircraft performance, calibration of instruments (altimeters, transponders encoders, etc) and for meteorological purposes
ABC of oxygen: Oxygen at high altitude
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1114067/ Competition: low
This is because the decreased driving pressure for oxygen from alveolar gas into arterial blood is insufficient to fully oxygenate the blood as it passes through the pulmonary capillaries. The cause of acute mountain sickness is not understood but is clearly related to hypoxia and factors such as effort, air temperature, previous viral respiratory tract infection, and innate susceptibility
Why does altitude affect air temperature? - Curiosity
http://curiosity.discovery.com/question/why-altitude-affect-air-temperature Competition: low
But why on Earth does it have to be so cold up there? We all know that the higher you go, the colder it gets, but why? Altitude affects the temperature of the air because air pressure gets lower as the altitude increases. Finally, just for comparison's sake, if you think we're taking a crushing blow walking around at sea level under that 14.7 pounds per square inches of pressure, you might enjoy buying a telescope and training it on Venus
http://www.obd-codes.com/p0108 Competition: low
It's usually a three wire sensor: a ground wire, a 5 volt reference wire from the PCM (Powertrain Control Module) to the MAP sensor, and a signal wire that informs the PCM of the MAP sensor voltage reading as it changes. Symptoms Symptoms of a P0108 DTC code may include: MIL (Malfunction Indicator Lamp) will likely be on Engine may run poorly Engine may not run at all Fuel mileage may decrease Presence of black smoke at exhaust Causes Potential causes of a P0108 code: Bad MAP sensor Leak in vacuum supply line to MAP sensor Engine vacuum leak Short on signal wire to PCM Short on reference voltage wire from PCM Open in ground circuit to MAP Worn engine causing low vacuum Possible Solutions A good way to diagnose if the MAP sensor is to blame would be to compare the KOEO (key on engine off) MAP sensor reading on a scan tool with the Barometric pressure reading
Why do airplanes fly in high altitudes even when the oxygen level there is less? - Yahoo! Answers India
http://in.answers.yahoo.com/question/index?qid=20100805043252AAP5B3j Competition: low
Need any more reasons? Source(s): Naval Aviator 3 years ago Report Abuse 2 people rated this as good by ? Member since: 07 June 2010 Total points: 2,323 (Level 3) Add Contact Block They have to fly in the stratosphere because the air is thinner, and it gets a lot better fuel efficiency because of the reduced drag
http://usatoday30.usatoday.com/weather/tg/whighlow/whighlow.htm Competition: low
Kepple What's happening inside highs and lows By Jack Williams, USATODAY.com Atmospheric pressure at the Earth's surface is one of the keys to weather, which is one reason weather maps feature H's and L's, representing areas of high and low air pressure. The air that descends in high-pressure areas has to get to high altitudes in some way, and its done by rising in areas where the pressure at the surface is low
atmospheric pressure - National Geographic Education
http://education.nationalgeographic.com/education/encyclopedia/atmospheric-pressure/?ar_a=1&ar_r=999 Competition: low
Photograph by an anonymous contributor, Wikipedia Why Do Your Ears Pop in Airplanes?As you go up in an airplane, the atmospheric pressure becomes lower than the pressure of the air inside your ears. An atmosphere (atm) is a unit of measurement equal to the average air pressure at sea level at a temperature of 15 degrees Celsius (59 degrees Fahrenheit)
Atmospheric Pressure
http://wn.com/atmospheric_pressure Competition: low
When barometers in the home are set to match the local weather reports, they measure pressure reduced to sea level, not the actual local atmospheric pressure. published: 01 Nov 2012 views: 1695 author: onlearningcurve rerelease Water Lift Atmospheric Pressure Torricelli Vacuum 10 meter potential Order: Reorder Duration: 2:43 Updated: 09 Aug 2013 This water is held in place with atmospheric pressure pushing on the surrounding pond water
Why do I change certain ingredients for high altitude cooking?
http://askville.amazon.com/change-ingredients-high-altitude-cooking/AnswerViewer.do?requestId=16713704 Competition: low
Answer from newfietom 3 people found this helpful It's all about the boiling point of water Having lived in Denver, CO, I've lived through high-altitude baking and there's nothing more frustrating than adjusting a recipe (baking) that you've known all your life only to end up with poor results anyway.... And if I remember my high school chemistry, then you are correct, that the less the air pressure, then the faster ( and lower the temp ) that will make water boil
http://www.colorado.edu/physics/phys1140/phys1140_f98/Experiments/O2/O2.html Competition: low
The pressure change due to an adiabatic volume change depends on whether the gas in question is monatomic, like helium or neon, or diatomic, like the main components or air, oxygen and nitrogen. The transducer output is a DC voltage () which is proportional to the pressure difference between the two ports; when the pressures are the same, the output is 0V
http://www.wunderground.com/blog/weatherhistorian/world-and-us-anticyclonic-high-barometric-pressure-records Competition: low
Photographer unknown.When converting atmospheric pressure to mean sea level (in order to have homogeneous readings regardless of elevation) a formula is used to calculate such. and European high-pressure records see The Highest of the Highs: Extremes of Barometric Pressure in the British Isles by Stephen Burt, Weather magazine Vol
http://uk.answers.yahoo.com/question/index?qid=20080206185900AABg8H9 Competition: low
However, when we add up the all the pressures from the large number of molecules that strike a surface each moment, then the total pressure is considerable. So, while the average altitude of the 500 millibar level is around 18,000 feet (5,600 meters) the actual elevation will be higher in warm air than in cold air
http://newton.dep.anl.gov/askasci/env99/env99406.htm Competition: low
Therefore it requires a lower temperature for water to boil at a higher altitude, and thus less time (not more), assuming that the amount of heat being used is the same as at sea level. Temperature sometimes increases with height from the surface upward a ways when a temperature inversion exists (resulting from cooling of the surface more rapidly than cooling of air above, as can happen on many nights)
http://www.livestrong.com/article/127091-effects-low-barometric-pressure-ears/ Competition: low
Your inner ear is fluid-filled, and fluids are not compressible; in theory that means there's no reason a change in barometric pressure would aggravate your symptoms. Worsening Meniere's If you have Meniere's syndrome, an inner ear abnormality that can lead to vertigo, dizziness and a sensation of pressure in your ear, your ears may not be able to compensate for pressure changes as well someone without the condition
http://www.altitude.org/home.php Competition: low
Please take the time to read some of the accounts of deaths at high altitude on this website, and this brave report from a son, describing how he lost his father in Peru in May 2012
http://www.altitude.org/why_less_oxygen.php Competition: low
The problem is that there are fewer molecules of everything present, including oxygen.So although the percentage of oxygen in the atmosphere is the same, the thinner air means there is less oxygen to breathe.Try using our barometric pressure calculator to see how air pressure changes at high altitudes. As you go up a mountain, the air becomes less compressed and is therefore thinner.The important effect of this decrease in pressure is this: in a given volume of air, there are fewer molecules present
atmospheric pressure - definition of atmospheric pressure by the Free Online Dictionary, Thesaurus and Encyclopedia.
http://www.thefreedictionary.com/atmospheric+pressure Competition: low
At sea level the atmospheric pressure is approximately 1 kilogram per square centimeter (14.7 pounds per square inch), which will cause a column of mercury in a mercury barometer to rise 760 millimeters (30.4 inches). Also called barometric pressure.A Closer Look The weight of the air mass, or atmosphere, that envelopes Earth exerts pressure on all points of the planet's surface
Why are jet engines more fuel efficient at high altitude? - PPRuNe Forums
http://www.pprune.org/tech-log/10655-why-jet-engines-more-fuel-efficient-high-altitude.html Competition: low
The work done in compressing the gas is recovered as the piston moves back down the cylinder under the pressure of the compressed gas (less friction losses etc.) If the piston compresses the gas to half its original volume, then it has a compression ratio of 2:1, as the piston recovers it can do work based on the compression it started with. All this can be proved mathematically from first principles through the laws of thermodynamics, a branch of Physics usually studied at second year degree level in Mechanical Engineering
http://www.challengers101.com/Pressure.html Competition: low
And, just as the creatures living at the bottom of the ocean are subjected to the pressure exerted on them by the water, we are subjected to the pressure exerted on us by the atmosphere. How much would the air in this tall, skinny column weigh? Remember the water in the tank above? Each square inch of bottom surface has to support the water above it
http://www.pbs.org/wgbh/nova/everest/exposure/pressure.html Competition: low
Evangelista Torricelli, one of the first to discover atmospheric pressure, once said, "We live submerged at the bottom of an ocean of the element air." The Earth's gravitational field is pulling on air, and this pull, or "pressure" of air, is called atmospheric pressure. In fact, meteorologists monitor atmospheric pressure at the Earth's surface in order to determine whether the pressure is rising or falling, which helps to predict weather patterns
Why is it Difficult to breathe when high altitude
http://wiki.answers.com/Q/Why_is_it_Difficult_to_breathe_when_high_altitude Competition: low
Therefore, doing physical activities at high altitude, where your body demands a lot of oxygen to function can be very difficult because you need more breaths to get the same amount of oxygen as you would at sea level. In other words, if you have a container of air at sea level, that container would hold more molecules than the same container would have at higher elevation
Why is it colder at high altitudes?
http://io9.com/5550672/why-is-it-colder-at-high-altitudes Competition: low
Rough, unpredictable, they're likely to bounce off each other, and run riot through the streets, and go to nightclubs with guns stuck in the waistbands of their jean shorts. They have more space to wander around in, and because they don't bounce off each other as much, because they're not crammed into a small space by the pressure of the air above them, each square inch has a much lower temperature than sea level air
How does the atmospheric pressure at altitudes below sea level compare with atmospheric pressure at sea level? - Yahoo! Answers
http://answers.yahoo.com/question/index?qid=20080604093531AAeojf2 Competition: low
A 3.1-L sample of hydrogen at the same temperature and pressure? has the same mass contains the same number of atoms has a higher density contains the same number of molecules If the atmospheric pressure on Mt. Other Answers (1) by Shaun W Member since: December 28, 2006 Total points: 245 (Level 1) Add Contact Block The link below is to noaa and can be used to calculate the pressure at any elevation
why water boils at a lower temperature at higher altitudes.
http://askville.amazon.com/water-boils-lower-temperature-higher-altitudes/AnswerViewer.do?requestId=68278432 Competition: low
The proverbial 3 minute egg would still be nearly raw at high altitude, because the water would boil at a relatively warm temperature! Hydroace 41 months ago Please sign in to give a compliment. Pressure cookers are able to cook food faster, because they allow food to boil at temperaturs above 212 deg farenheit (or 100 celcius) by pressurizing the food as it cooks
Altitude - Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Altitude Competition: low
Although the term altitude is commonly used to mean the height above sea level of a location, in geography the term elevation is often preferred for this usage. On the flight deck, the definitive instrument for measuring altitude is the pressure altimeter, which is an aneroid barometer with a front face indicating distance (feet or metres) instead of atmospheric pressure
http://www.ehow.com/facts_5814364_high-low-reading-barometric-pressure_.html Competition: low
How to Read Barometric Pressure What Is a High or Low Reading in Barometric Pressure? How to Understand Barometric Pressure Readings; How to Interpret Barometric Pressure Readings;... Health Effects of High Barometric Pressure Barometric pressure, or atmospheric pressure, is the pressure exerted by the tiny molecules of air present in the atmosphere
Why does air pressure decrease with an increase in altitude
http://wiki.answers.com/Q/Why_does_air_pressure_decrease_with_an_increase_in_altitude Competition: low
Last edit by EldestSon18 Answer History Related Answers: Why does air pressure decrease with an increase in altitude? The higher you are, the less air there is above weighing down uponyou.This has to do with the fact t Does air pressure decrease with increasing altitudes? yes Why air pressure decreases with increasing altitude? Air, like everything on earth is subject to gravity - air pressure decreases at higher altitudes bec Does air pressure decrease at a constant rate with increased altitude? No, decreasing rate What does air pressure do when altitude increases? Air pressure decreases with increase of height
http://www.ehow.com/facts_5900925_low-barometric-pressure-headaches.html Competition: low
Predict Your Next Headache Keeping a barometer along with a headache diary has been shown to be an effective way of knowing when your next headache will occur. Physical Effects of Barometric Pressure Changes The Center cited other weather conditions as causes in conjunction with the falling barometric pressure, ..
Barometric Pressure
http://www.barometricpressure.org/ Competition: low
Although it is something people can take for granted, it has a direct influence on life, as it can determine whether the climate will be sunny or stormy
Atmospheric pressure - Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Atmospheric_pressure Competition: low
When barometers in the home are set to match the local weather reports, they measure pressure reduced to sea level, not the actual local atmospheric pressure. The highest sea-level pressure on Earth occurs in Siberia, where the Siberian High often attains a sea-level pressure above 1050.0 mbar (105.00 kPa, 30.01 inHg), with record highs close to 1085.0 mbar (108.50 kPa, 32.04 inHg)
Effects of Pressure and Density Altitude on Aircraft Performance
For example, aircraft all up weight is something we can do about but air density depends on more factors, as we will see, and most of them we can not influence at all. International Standard Atmosphere A standard atmosphere has been established to enable comparison of aircraft performance, calibration of instruments (altimeters, transponders encoders, etc) and for meteorological purposes
ABC of oxygen: Oxygen at high altitude
This is because the decreased driving pressure for oxygen from alveolar gas into arterial blood is insufficient to fully oxygenate the blood as it passes through the pulmonary capillaries. The cause of acute mountain sickness is not understood but is clearly related to hypoxia and factors such as effort, air temperature, previous viral respiratory tract infection, and innate susceptibility
Why does altitude affect air temperature? - Curiosity
But why on Earth does it have to be so cold up there? We all know that the higher you go, the colder it gets, but why? Altitude affects the temperature of the air because air pressure gets lower as the altitude increases. Finally, just for comparison's sake, if you think we're taking a crushing blow walking around at sea level under that 14.7 pounds per square inches of pressure, you might enjoy buying a telescope and training it on Venus
It's usually a three wire sensor: a ground wire, a 5 volt reference wire from the PCM (Powertrain Control Module) to the MAP sensor, and a signal wire that informs the PCM of the MAP sensor voltage reading as it changes. Symptoms Symptoms of a P0108 DTC code may include: MIL (Malfunction Indicator Lamp) will likely be on Engine may run poorly Engine may not run at all Fuel mileage may decrease Presence of black smoke at exhaust Causes Potential causes of a P0108 code: Bad MAP sensor Leak in vacuum supply line to MAP sensor Engine vacuum leak Short on signal wire to PCM Short on reference voltage wire from PCM Open in ground circuit to MAP Worn engine causing low vacuum Possible Solutions A good way to diagnose if the MAP sensor is to blame would be to compare the KOEO (key on engine off) MAP sensor reading on a scan tool with the Barometric pressure reading
Why do airplanes fly in high altitudes even when the oxygen level there is less? - Yahoo! Answers India
Need any more reasons? Source(s): Naval Aviator 3 years ago Report Abuse 2 people rated this as good by ? Member since: 07 June 2010 Total points: 2,323 (Level 3) Add Contact Block They have to fly in the stratosphere because the air is thinner, and it gets a lot better fuel efficiency because of the reduced drag
Kepple What's happening inside highs and lows By Jack Williams, USATODAY.com Atmospheric pressure at the Earth's surface is one of the keys to weather, which is one reason weather maps feature H's and L's, representing areas of high and low air pressure. The air that descends in high-pressure areas has to get to high altitudes in some way, and its done by rising in areas where the pressure at the surface is low
atmospheric pressure - National Geographic Education
Photograph by an anonymous contributor, Wikipedia Why Do Your Ears Pop in Airplanes?As you go up in an airplane, the atmospheric pressure becomes lower than the pressure of the air inside your ears. An atmosphere (atm) is a unit of measurement equal to the average air pressure at sea level at a temperature of 15 degrees Celsius (59 degrees Fahrenheit)
Atmospheric Pressure
When barometers in the home are set to match the local weather reports, they measure pressure reduced to sea level, not the actual local atmospheric pressure. published: 01 Nov 2012 views: 1695 author: onlearningcurve rerelease Water Lift Atmospheric Pressure Torricelli Vacuum 10 meter potential Order: Reorder Duration: 2:43 Updated: 09 Aug 2013 This water is held in place with atmospheric pressure pushing on the surrounding pond water
Why do I change certain ingredients for high altitude cooking?
http://askville.amazon.com/change-ingredients-high-altitude-cooking/AnswerViewer.do?requestId=16713704 Competition: lowAnswer from newfietom 3 people found this helpful It's all about the boiling point of water Having lived in Denver, CO, I've lived through high-altitude baking and there's nothing more frustrating than adjusting a recipe (baking) that you've known all your life only to end up with poor results anyway.... And if I remember my high school chemistry, then you are correct, that the less the air pressure, then the faster ( and lower the temp ) that will make water boil
The pressure change due to an adiabatic volume change depends on whether the gas in question is monatomic, like helium or neon, or diatomic, like the main components or air, oxygen and nitrogen. The transducer output is a DC voltage () which is proportional to the pressure difference between the two ports; when the pressures are the same, the output is 0V
Photographer unknown.When converting atmospheric pressure to mean sea level (in order to have homogeneous readings regardless of elevation) a formula is used to calculate such. and European high-pressure records see The Highest of the Highs: Extremes of Barometric Pressure in the British Isles by Stephen Burt, Weather magazine Vol
However, when we add up the all the pressures from the large number of molecules that strike a surface each moment, then the total pressure is considerable. So, while the average altitude of the 500 millibar level is around 18,000 feet (5,600 meters) the actual elevation will be higher in warm air than in cold air
Therefore it requires a lower temperature for water to boil at a higher altitude, and thus less time (not more), assuming that the amount of heat being used is the same as at sea level. Temperature sometimes increases with height from the surface upward a ways when a temperature inversion exists (resulting from cooling of the surface more rapidly than cooling of air above, as can happen on many nights)
Your inner ear is fluid-filled, and fluids are not compressible; in theory that means there's no reason a change in barometric pressure would aggravate your symptoms. Worsening Meniere's If you have Meniere's syndrome, an inner ear abnormality that can lead to vertigo, dizziness and a sensation of pressure in your ear, your ears may not be able to compensate for pressure changes as well someone without the condition
Please take the time to read some of the accounts of deaths at high altitude on this website, and this brave report from a son, describing how he lost his father in Peru in May 2012
The problem is that there are fewer molecules of everything present, including oxygen.So although the percentage of oxygen in the atmosphere is the same, the thinner air means there is less oxygen to breathe.Try using our barometric pressure calculator to see how air pressure changes at high altitudes. As you go up a mountain, the air becomes less compressed and is therefore thinner.The important effect of this decrease in pressure is this: in a given volume of air, there are fewer molecules present
atmospheric pressure - definition of atmospheric pressure by the Free Online Dictionary, Thesaurus and Encyclopedia.
At sea level the atmospheric pressure is approximately 1 kilogram per square centimeter (14.7 pounds per square inch), which will cause a column of mercury in a mercury barometer to rise 760 millimeters (30.4 inches). Also called barometric pressure.A Closer Look The weight of the air mass, or atmosphere, that envelopes Earth exerts pressure on all points of the planet's surface
Why are jet engines more fuel efficient at high altitude? - PPRuNe Forums
The work done in compressing the gas is recovered as the piston moves back down the cylinder under the pressure of the compressed gas (less friction losses etc.) If the piston compresses the gas to half its original volume, then it has a compression ratio of 2:1, as the piston recovers it can do work based on the compression it started with. All this can be proved mathematically from first principles through the laws of thermodynamics, a branch of Physics usually studied at second year degree level in Mechanical Engineering
And, just as the creatures living at the bottom of the ocean are subjected to the pressure exerted on them by the water, we are subjected to the pressure exerted on us by the atmosphere. How much would the air in this tall, skinny column weigh? Remember the water in the tank above? Each square inch of bottom surface has to support the water above it
Evangelista Torricelli, one of the first to discover atmospheric pressure, once said, "We live submerged at the bottom of an ocean of the element air." The Earth's gravitational field is pulling on air, and this pull, or "pressure" of air, is called atmospheric pressure. In fact, meteorologists monitor atmospheric pressure at the Earth's surface in order to determine whether the pressure is rising or falling, which helps to predict weather patterns
Why is it Difficult to breathe when high altitude
Therefore, doing physical activities at high altitude, where your body demands a lot of oxygen to function can be very difficult because you need more breaths to get the same amount of oxygen as you would at sea level. In other words, if you have a container of air at sea level, that container would hold more molecules than the same container would have at higher elevation
Why is it colder at high altitudes?
Rough, unpredictable, they're likely to bounce off each other, and run riot through the streets, and go to nightclubs with guns stuck in the waistbands of their jean shorts. They have more space to wander around in, and because they don't bounce off each other as much, because they're not crammed into a small space by the pressure of the air above them, each square inch has a much lower temperature than sea level air
How does the atmospheric pressure at altitudes below sea level compare with atmospheric pressure at sea level? - Yahoo! Answers
A 3.1-L sample of hydrogen at the same temperature and pressure? has the same mass contains the same number of atoms has a higher density contains the same number of molecules If the atmospheric pressure on Mt. Other Answers (1) by Shaun W Member since: December 28, 2006 Total points: 245 (Level 1) Add Contact Block The link below is to noaa and can be used to calculate the pressure at any elevation
why water boils at a lower temperature at higher altitudes.
http://askville.amazon.com/water-boils-lower-temperature-higher-altitudes/AnswerViewer.do?requestId=68278432 Competition: lowThe proverbial 3 minute egg would still be nearly raw at high altitude, because the water would boil at a relatively warm temperature! Hydroace 41 months ago Please sign in to give a compliment. Pressure cookers are able to cook food faster, because they allow food to boil at temperaturs above 212 deg farenheit (or 100 celcius) by pressurizing the food as it cooks
Altitude - Wikipedia, the free encyclopedia
Although the term altitude is commonly used to mean the height above sea level of a location, in geography the term elevation is often preferred for this usage. On the flight deck, the definitive instrument for measuring altitude is the pressure altimeter, which is an aneroid barometer with a front face indicating distance (feet or metres) instead of atmospheric pressure
How to Read Barometric Pressure What Is a High or Low Reading in Barometric Pressure? How to Understand Barometric Pressure Readings; How to Interpret Barometric Pressure Readings;... Health Effects of High Barometric Pressure Barometric pressure, or atmospheric pressure, is the pressure exerted by the tiny molecules of air present in the atmosphere
Why does air pressure decrease with an increase in altitude
Last edit by EldestSon18 Answer History Related Answers: Why does air pressure decrease with an increase in altitude? The higher you are, the less air there is above weighing down uponyou.This has to do with the fact t Does air pressure decrease with increasing altitudes? yes Why air pressure decreases with increasing altitude? Air, like everything on earth is subject to gravity - air pressure decreases at higher altitudes bec Does air pressure decrease at a constant rate with increased altitude? No, decreasing rate What does air pressure do when altitude increases? Air pressure decreases with increase of height
Predict Your Next Headache Keeping a barometer along with a headache diary has been shown to be an effective way of knowing when your next headache will occur. Physical Effects of Barometric Pressure Changes The Center cited other weather conditions as causes in conjunction with the falling barometric pressure, ..
Barometric Pressure
Although it is something people can take for granted, it has a direct influence on life, as it can determine whether the climate will be sunny or stormy
Atmospheric pressure - Wikipedia, the free encyclopedia
When barometers in the home are set to match the local weather reports, they measure pressure reduced to sea level, not the actual local atmospheric pressure. The highest sea-level pressure on Earth occurs in Siberia, where the Siberian High often attains a sea-level pressure above 1050.0 mbar (105.00 kPa, 30.01 inHg), with record highs close to 1085.0 mbar (108.50 kPa, 32.04 inHg)
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