Secondly, the polluted air current in CDRS is constrained by the driven cyclone passageway, and the velocity components of air current has axial, radial and tangential, so the air current in CDRS is transformed to a spiral air current.
He studied the effects of air friction and surface area on the speed of the air current over a streamlined body.
To obtain basic data on adequate air circulation to enhance plant growth in a closed plant culture system in a controlled ecological life support system (CELSS), an investigation was made of the effects of the air current speed ranging from 0.01 to 1.0 m s−1 on photosynthesis and transpiration in sweetpotato leaves and photosynthesis in tomato seedlings canopies.
The effective speed of air travel has been steadily declining in the last five years.
The jet stream, as its name suggests, is a high-speed air current in the atmosphere that brings with it the weather.
For the production of cotton blends, air-jet spinning may be used; in this high-speed method, air currents wrap loose fibres around a straight sliver core.
The transpiration rate increased gradually at air current speeds ranging from 0.2 to 1.0 m s−1 while the net photosynthetic rate was almost constant at air current speeds ranging from 0.5 to 1.0 m s−1.
A train passing at high speed creates a powerful air current that can pull workers onto the tracks, particularly if trains are passing on both sides, he added.
Their speed and direction depend on air currents at various heights, because they are caused by refraction of sunlight by small inhomogeneities in Earth's atmosphere.
The net photosynthetic rate of the plant canopy was doubled by an increased air current speed from 0.1 to 1.0 m s−1 above the plant canopy.
As the bird flies to the ground, it must be constantly aware of its height above the ground, the orientation of its body axis relative to the ground, deviations in flight direction resulting from air currents, and its speed of fall.
