How do you define a constant air supply?
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One which is not interrupted. This can be done with a reserve tank, for example, as in an "air hose". It can deliver a constant supply of air, from the reserve and then ,as the pressure begins to dissipate, the pump comes back on, keeping the supply constant. The pressure in the tank is maintained at a higher level than at the "regulated" out put.
855254
air flow. if your house does not have it , it will not breath properly
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HVAC may also stand for High-voltage alternating current\n\nHVAC (pronounced either "H-V-A-C" or, occasionally, "H-VAK") is an initialism/acronym that stands for "heating, ventilation and air-conditioning". This is sometimes referred to as climate control.\n\nThese three functions are closely interrelated, as they control the temperature and humidity of the air within a building in addition to providing for smoke control, maintaining pressure relationships between spaces, and providing fresh air for occupants. In modern building designs, the design, installation and control systems of these functions are integrated into a single "HVAC" system.\n\nIn certain regions (e.g., UK), the term "Building Services" is also used and HVAC Engineers are called Building Services Engineers. See CIBSE.\n\nThe term air handler can mean a whole unit including the blower, heating and cooling elements, filter racks or chamber and dampers, but not including the ductwork through the building.
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well i know with simple instructions!\n\nTo measure how much air your lungs can hold by making a spirometer.\nInstructions: Lung Capacity\n1\nWhat You Need\n• 2 or 3 liter plastic bottle\n• Large, deep bowl or plastic dishpan\n• Water\n• Masking tape\n• Measuring cup\n• 30 cm (1 foot) long piece of flexible tubing (aquarium tubing works well)\nTo Do and Observe\n1. Vertically attach a strip of masking tape to the plastic bottle, from the\nbottom to the top of it. Fill the measuring cup with 60ml of water. Pour\nthe water into the bottle. Mark the water level on the tape. Repeat until\nyou've marked to the top of the bottle.\n2. Fill the dishpan about 10cm (4 inches) high with water.\n3. Fill the plastic bottle to the top with water, and hold your fingers over the\nmouth of the bottle so the mouth is completely covered.\n4. Invert the bottle into the pan of water. Make sure you do not remove your\nfingers until the mouth of the bottle is completely submerged. Insert one\nend of the tubing into the mouth of the bottle.\n5. Take a breath and exhale completely into the open end of the tubing.\n6. Measure how much air is now in the bottle (count the marks). To calculate\nyour lung capacity, multiply the number of marks by 60ml. If your pan is not\ntoo full of water, you can repeat without filling the bottle back up.\nWhat's Going On\n• The amount of air you can hold in your lungs is called lung capacity, and\ncan be measured with a spirometer. Blowing air from your lungs into the\nbottle forces a measurable amount of the water out of the bottle, which\nadds to the volume of water in your pan. This method of measuring uses\ndisplacement – you're displacing a volume of water with a volume of air.\nInstructions: Lung Capacity\n• Displacement is often used when something can't be measured directly. What else could you\nmeasure using displacement?\nTips\n• Check for variations in lung capacity in people of different sizes (older students,\nyou). Ask your class to look for a correlation between body size and lung\ncapacity.\n• Have each participant test for a difference between a "normal" breath of air and\nan "expanded" deeper breath.
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Air has pressure, much like any gas.  By using this pressure it fills in cracks and crevices.
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From one inch to 3/4  depending on length less than 500 feet and the demand for air at the station\n\n...\nno
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Usually psi (pounds per square inch).\n\nAloha
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That is adiabatic cooling (by expansion). When air is forced to expand (like when it rises) it will become cooler.\n\nWhen air is forcefully compressed, that is adiabatic heating.\n\nThe answer is ADIABATIC TEMPERATURE CHANGES
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A vacuum is a volume of space that is substansively empty of matter, so that gaseous pressure is much less than standard atmospheric pressure. The root of the word vacuum is the Latin adjective vacuus which means "empty," but space can never be perfectly empty. A perfect vacuum, known as "free space", with a gaseous pressure of absolute zero is a philosophical concept with no physical reality, not least because quantum theory predicts that no volume of space is perfectly empty in this way. Physicists often use the term "vacuum" slightly differently. They discuss ideal test results that would occur in a perfect vacuum, which they simply call "vacuum" in this context, and use the term partial vacuum to refer to the imperfect vacua realized in practice.
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Define high pressure. Define high capacity.\n\nAre these reciprocating or centrifugal compressors?
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IT MEANS THAT AIR HAD ENTERED IT
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The air mass can hold a maximum of about 6% humidity. This varies with the temperature of the air. The warmer the air, the more water vapor it can hold. The cooler the air, the less vapor it can hold. Relative humidity is a measurement based on the amount of water the air mass, at that specific temperature can hold. For example, if the air mass at a given temperature can potentially hold 4% water vapor, but only has 2% in it then the realtive humidity is 50%. As temperature rises, so does the capability for the air mass to hold more moisture. Assuming no additional moisture is added to the air mass, the relative humidity will decrease as the potential for holding more moisture increases.
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CPAP is Continuous Positive Airway Pressure machine is a device that delivers air at a constant elevated pressure to your airways usually during hours of sleep.It usually uses face masks or nasal prongs to deliver the air.\nThe most usual need for this is for a person who has OSA or obstructive sleep apnea\nHow does it work- well people with sleep apnea particularly the type that results from obesity loose airway muscle tone in deep sleep and this causes the airways to shut down and the oxygen saturaton in the blood to drop dangerously... the CPAP machine allows increased air pressure to be delivered to prevent these episodes.\n\nParameters? The settings are decided by an MD certified in sleep medicine (usually a pulmonologist or a neurologist) during a CPAP titration study.It takes into consideration several issues ...how you tolerate different masks..if you need supplimental Oxygen or not etc.  It is a very specialised field and you should follow recommendations form your sleep MD.
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Here's one: Measure the density of air.\n\nTake a flask, weigh it.\nVacuum out all the air, then weight it again.
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Is it within a vacuum?\n\nIf not, and if through your above given conditions resulted in air being compressed or what have you then I guess it would.
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Here you go:\n\n"Critical oxygen tension is the minimum amount of dissolved oxygen necessary to sustain metabolic processes."\n\nCheers!
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Fresh air is from the engines.  The first stages of a jet engine compresses the air.  The air heats up when it's compressed.  Part of that compressed air is piped off and goes through heat exchangers, cooling it to about 32F.  That cool air and some of the hot air from the engine are combined to give a comfortable tempurature in the cabin.  This flow of air pressurizes the fuselage so that the passingers can breath normally.  Valves in the fuselage control this pressure, preventing over or under pressurization.