Ingrown toenail. An ingrown toenail occurs when the edge of the nail grows down and into the skin of the toe. Causes. An ingrown toenail can result from a number of things. Poorly fitting shoes and toenails that are not properly trimmed are the most common causes. The skin along the edge of a toenail may become red and infected.
Best Answer: It depends on your height above the surface of the water. where h is the height above ground or sea level (in meters) of the eye of the observer. For an observer standing at sea level with h = 1.70 metres (5 ft 7 in) (average eye-level height), the horizon is at a distance of 4.7 kilometres (2.9 mi).
Using this, the distance to the horizon is: SQRT (h+2rh). Using feet throughout (for a six foot eye height) the calculation becomes: SQRT (6+(2*21120000*6) = 15920 feet. Divide this by 5,280 (feet in a mile) and you get 3.01 miles. matt_london s formula is a boiled down version of this one.sing this, the distance to the horizon is: SQRT (h+2rh). Using feet throughout (for a six foot eye height) the calculation becomes: SQRT (6+(2*21120000*6) = 15920 feet. Divide this by 5,280 (feet in a mile) and you get 3.01 miles. matt_london s formula is a boiled down version of this one.