The fluid which we breathe, and which surrounds the earth; the atmosphere. It is invisible, inodorous, insipid, transparent, compressible, elastic, and ponderable.
A particular state of the atmosphere, as respects heat, cold, moisture, etc., or as affecting the sensations; as, a smoky air, a damp air, the morning air, etc.
Any aëriform body; a gas; as, oxygen was formerly called vital air.
That which surrounds and influences.
The representation or reproduction of the effect of the atmospheric medium through which every object in nature is viewed.
The mixture of oxygen, nitrogen, and other gases, which with varying amounts of water vapor, forms the atmosphere of the earth.
formerly a general term for any gas (elastic fluid). [Black, Cavendish, Priestley
the gas that surrounds the earth. It contains oxygen, nitrogen, and carbon dioxide.
The air we breathe is made up of several gases including nitrogen, oxygen, carbon dioxide, and other gases. The air we exhale has a higher level of carbon dioxide than the air we breathe.
Combustion of gas or liquid fuels requires the presence of oxygen in adequate supply. Normally this is supplied from the air. Air used in combustion is of two types, (i) primary air (which air is mixed with the gas or liquid fuel prior to combustion) and (ii) secondary air (air admitted to the flame without prior mixing with the fuel). The term "excess air" refers to the air passing up the flue and not actually used in combustion. A certain amount of excess air is required, but not too much, as it is a source of loss of heat.
The mixture of gases and particles that make up our atmosphere.
is the elastic, invisible mixture of gases (chiefly nitrogen and oxygen) that may be used with medical equipment; also called medical air.
mixture of gases containing 78% nitrogen, 21% oxygen, about 1% argon and traces of neon, krypton, xenon and helium
a mixture of gases that surrounds the Earth
a mixture of gases (especially oxygen) required for breathing; the stuff that the wind consists of; "air pollution"; "a smell of chemicals in the air"; "open a window and let in some air"; "I need some fresh air"
a distinctive but intangible quality surrounding a person or thing; "an air of mystery"; "the house had a neglected air"; "an atmosphere of defeat pervaded the candidate's headquarters"; "the place had an aura of romance"
the mass of air surrounding the Earth; "there was great heat as the comet entered the atmosphere"; "it was exposed to the air"
The mixture of gases comprising the earth's atmosphere.
The air that we breathe is a mixture of gases. The composition of dry-air at sea level is shown below
A mixture of gases and aerosols that composes the atmosphere surrounding Earth. The primary gases of dry air are nitrogen (78%) and oxygen (21%). Trace gases and aerosols make up the remaining 1%. The trace gases include argon, neon, helium, krypton and xenon; hydrogen; and the greenhouse gases. The water vapour content of air can also be significant, but is highly variable with time and from one region to the next. In some locations it can be virtually absent, while in others it can represent a few percent of air volume. Most air is found in the lowest 10 kilometres of the atmosphere.
A mix of gases that holds various amounts of particles and liquids at any given time. In our atmosphere, Nitrogen is the most abundant gas followed by Oxygen.
1. A component of air-fuel mixture. 2. A fluid used in compressed gas for inflating pneumatic tyres, operating air brakes, etc.
Air is made up of approximately 20.95% Oxygen, O2, 78.08% Nitrogen, N2, .03% Carbon Dioxide, CO2, and .94% water vapor and trace elements or gases. For most non scientific purposes or applications, these values are rounded up to 21% O2 and 79% N2
A gas comprising the following constituents (when dry): 78.09% nitrogen 20.95% oxygen 0.93% argon 0.03% carbon dioxide
The mixture of gases that make up the atmosphere; 78% nitrogen, 21% oxygen with the balance consisting of smaller amounts of gases including argon, carbon dioxide, neon, helium, and other gases.
The air or atmosphere that surrounds the earth is one of the main components of our environment.
a mixture of invisible molecules of nitrogen, oxygen, carbon dioxide, water vapor, and other substance
A colorless, odorless, tasteless gas. A mixture of individual gases. The gaseous mixture surrounding the earth. Standard density of dry air free of carbon dioxide (0°C, 101,325 kPa) is equal to 1,292 8 g/L. Standard conditions for air in spectroscopy are 101,325 kPa, 15°C, 0,03 % CO2, dry.
A gas mixture consisting of nitrogen, oxygen, argon, carbon dioxide, hydrogen, and small quantities of neon, helium and other gases.
the mixture of gases that surrounds the earth
a gas mixture containing 21% oxygen, 78% nitrogen, and 1% other gases (mainly argon); compressed air is used for recreational scuba diving.
The mixture of gases forming the atmosphere. Dry air is composed mainly of nitrogen and oxygen with small amounts of carbon dioxide, hydrogen, ozone, and the inert gases. Moist air contains, in addition, varying amounts of water vapor.
A naturally occurring mixture of gases, chiefly nitrogen and oxygen with small amounts of argon, carbon dioxide, and water vapour. Air also usually contains dust and pollen.
This is considered the mixture of gases that make up the earth's atmosphere. The principal gases that compose dry air are Nitrogen (N2) at 78.09%, Oxygen (O2) at 20.946%, Argon (A) at 0.93%, and Carbon Dioxide (CO2) at 0.033%. One of the most important constituents of air and most important gases in meteorology is water vapor (H2O).
Mixture of gases which composes the Earth's atmosphere.
Mixture of gases forming the earth's atmosphere, consisting of nitrogen (âˆ¼78 percent), oxygen (âˆ¼21 percent), water vapor, and other trace gases such as carbon dioxide, helium, argon, ozone, or various pollutants. The concentration of water vapor is very variable, being a strong function of temperature and, hence, altitude in the atmosphere. Dry air is referred to as air from which measurable amounts of water vapor have been physically removed. Pure, dry air has a density of 1.293 kg mâˆ’3 at a temperature of 273 K and a pressure of 101.325 kPa. Apart from the variability of water vapor, the composition of air is essentially constant to an altitude of at least 50 km and is presently approximated as follows. The concentration of ozone is variable, between 10 and 0.1 parts per million. Carbon dioxide, methane, and nitrous oxide have all been increasing since the beginning of the industrial age.
A mixture of gases making up the atmosphere which surrounds the Earth.
so-called "pure" air is a mixture of gases containing about 78 percent nitrogen; 21 percent oxygen; less than 1 percent of carbon dioxide, argon, and other inert gases; and varying amounts of water vapor
All air supplied to mechanical equipment and appliances for combustion, ventilation, cooling, etc. Standard air is air at standard temperature and pressure, namely, 70°F (21°C) and 29.92 inches of mercury (101.3 kPa).
According to modern science, air (the atmosphere) is a mixture of many compounds, but in traditional cultures, air is often seen as a universal power or pure substance. Its fundamental importance to life can be seen in words such as spirit, inspire, expire, and aspire, all derived from the Latin spirare ("to breathe").