Science / Weather / Air: 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).
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Air Noun Synonyms: atmosphere, ambience, aura, climate, feeling, sense, mood, quality
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Technology / Motorcycle / Helmet Hair: Wearing a motorcycle helmet tends to mess up one's hair. Removing the helmet usually leaves hair sticking out in all directions. This is called helmet hair. It can be minimized by use of special skull MORE
Entertainment / Ballet / Rond De Jambe En Lair: in the air. The leg is lifted to the side, movement is only below the knee. If the thigh is horizontal, the toe draws an oval approximately between the knee of the support leg and the second position MORE
Technology / Motorcycle / Air Cooling: A method of dissipating heat from a motorcycle engine to keep it at operating temperature by way of air flow. In practice, cooling is effected by air rushing around a moving motorcycle engine and is a MORE