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The gauss is the unit of magnetic flux density B in the system of Gaussian units and is equal to Mx/cm 2 or g/Bi/s 2, while the oersted is the unit of H-field. One tesla (T) corresponds to 10 4 gauss, and one ampere (A) per metre corresponds to 4π × 10 −3 oersted .
The UV-B flux is 2–4 times greater during the middle 4–6 hours of the day, and is not significantly absorbed by cloud cover or up to a meter of water. [ 47 ] Ultraviolet light, specifically UV-B, has been shown to cause cataracts and there is some evidence that sunglasses worn at an early age can slow its development in later life. [ 18 ]
A least-squares fit to the magnetic field measurements gives the Earth's field as the sum of spherical harmonics, each multiplied by the best-fitting Gauss coefficient g m ℓ or h m ℓ. [13] The lowest-degree Gauss coefficient, g 0 0, gives the contribution of an isolated magnetic charge
Because of the increasing popularity of water sports (particularly PWC), the number of vessels in use has increased in the last several decades. According to the U.S. Coast Guard, the number of registered vessels was 8,557,857 in 1980 and 12,875,568 in 2007. [16] This has resulted in more-crowded waterways and increased hazards.
Awareness of water poisoning has increased recently, thanks to a series events that have also called into question just how much water people should be drinking daily.
One tesla is equal to 10 4 gauss. Magnetic field drops off as the inverse cube of the distance ( 1 / distance 3 ) from a dipole source. Energy required to produce laboratory magnetic fields increases with the square of magnetic field. [2]
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