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d = run Δh = rise l = slope length α = angle of inclination. The grade (US) or gradient (UK) (also called stepth, slope, incline, mainfall, pitch or rise) of a physical feature, landform or constructed line is either the elevation angle of that surface to the horizontal or its tangent.
In the United States, the Thistle was chosen as primary yardstick for compilation in 1961 with a value of 83.0, which corresponded to its RYA PN rating at the time. Other boats were compared using their DIYRA (Dixie Inland Yacht Racing Association) rating to produce the D-PN (Dixie-Portsmouth Number).
The process of determining the PHRF for an individual boat begins with the regional PHRF rating, then adjustments are made for the individual attributes of the boat such as: modifications to the rig, the size of the largest foresail (jib or genoa), the size of the spinnakers, type of keel (full, fin, wing etc.), the number of blades on the propeller, and the style of the propeller (fixed ...
A trailhead signage that shows the grade of a walking path at a park in Sydney, Australia.. A trail difficulty rating system, also known as walking track grading system, walk gradings or trail grades, is a classification system for trails or walking paths based on their relative technical and physical difficulty. [1]
A woman whose testimony was key to the criminal sex trafficking conviction of Ghislaine Maxwell has died of a drug overdose, authorities confirmed.
The pavement condition index (PCI) is a numerical index between 0 and 100, which is used to indicate the general condition of a pavement section.The PCI is widely used in transportation civil engineering [1] and asset management, and many municipalities use it to measure the performance of their road infrastructure and their levels of service. [2]
In 2025, Social Security retirees can get a check worth up to $5,108 every single month. According to the Social Security Administration, this is the maximum benefit payment available. It’s also ...
The 1960s were a golden age for glamorous dining. Folks took their dinner parties very seriously, and swanky dishes were rooted in delicious flavors and showy spectacles (similar to fancy food in ...