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  2. Grade (slope) - Wikipedia

    en.wikipedia.org/wiki/Grade_(slope)

    This is commonly used in Europe to denote the incline of a railway. It is sometimes written as mm/m or m/km instead of the ‰ symbol. [1] [2] as a ratio of one part rise to so many parts run. For example, a slope that has a rise of 5 feet for every 1000 feet of run would have a slope ratio of 1 in 200.

  3. Stream gradient - Wikipedia

    en.wikipedia.org/wiki/Stream_gradient

    Stream gradient (or stream slope) is the grade (or slope) of a stream. It is measured by the ratio of drop in elevation and horizontal distance. [ 1 ] It is a dimensionless quantity , usually expressed in units of meters per kilometer (m/km) or feet per mile (ft/mi); it may also be expressed in percent (%).

  4. Slope - Wikipedia

    en.wikipedia.org/wiki/Slope

    Slope illustrated for y = (3/2)x − 1.Click on to enlarge Slope of a line in coordinates system, from f(x) = −12x + 2 to f(x) = 12x + 2. The slope of a line in the plane containing the x and y axes is generally represented by the letter m, [5] and is defined as the change in the y coordinate divided by the corresponding change in the x coordinate, between two distinct points on the line.

  5. Grade (climbing) - Wikipedia

    en.wikipedia.org/wiki/Grade_(climbing)

    The American YDS (or 'Yosemite Decimal System') was developed independently by climbers at Tahquitz Peak who adapted the class 5 rating of Sierra Club Class 1–5 system in the 1950s. [4] As a result, the system has a "5" as its prefix which is then followed by a decimal point and a number that starts at 1 and counts up with increasing ...

  6. Angle of climb - Wikipedia

    en.wikipedia.org/wiki/Angle_of_Climb

    In aerodynamics, climb gradient is the ratio between distance travelled over the ground and altitude gained, and is expressed as a percentage. The angle of climb can be defined as the angle between a horizontal plane representing the Earth's surface, and the actual flight path followed by the aircraft during its ascent.

  7. Dimensional analysis - Wikipedia

    en.wikipedia.org/wiki/Dimensional_analysis

    The factor 0.3048 m/ft is identical to the dimensionless 1, so multiplying by this conversion factor changes nothing. Then when adding two quantities of like dimension, but expressed in different units, the appropriate conversion factor, which is essentially the dimensionless 1, is used to convert the quantities to the same unit so that their ...

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