Fluorosis is a cosmetic condition that affects the teeth. Itâs caused by overexposure to fluoride during the first eight years of life. This is the time when most permanent teeth are being formed. After the teeth come in, the teeth of those affected by fluorosis may appear mildly discolored.
The eye that shows up in mature hurricanes represents the center of the storm. Counterintuitively to some, the eye represents an area of the hurricane where there is little to no precipitation, the sun or stars can be visible for a time, and the winds are light.Also within the eye is the lowest barometric pressure associated with the hurricane.The eye of a hurricane can range in size from about 5 miles (8 km) up to as wide as 120 miles (200 km) in diameter; however, a typical size is usually about 20-40 miles (30-60 km).he eye that shows up in mature hurricanes represents the center of the storm. Counterintuitively to some, the eye represents an area of the hurricane where there is little to no precipitation, the sun or stars can be visible for a time, and the winds are light.
The following graph (Figure 7u-3) shows the relationship between surface pressure and sustained wind speed for a number of tropical low pressure systems. Figure 7u-3: Relationship between surface pressure and wind speed for a number of tropical lowpressure systems. Tropical low pressure systems are classified as hurricanes when their pressure is 980 millibars or lower, and sustained wind speeds are greater than 118 kilometers per hour. Hurricanes have no fronts associated with them like the mid-latitude cyclones of the polar front.