When.com Web Search

Search results

  1. Results From The WOW.Com Content Network
  2. Minute and second of arc - Wikipedia

    en.wikipedia.org/wiki/Minute_and_second_of_arc

    A minute of arc, arcminute (arcmin), arc minute, or minute arc, denoted by the symbol ′, is a unit of angular measurement equal to ⁠ 1 / 60 ⁠ of one degree. [1] Since one degree is ⁠ 1 / 360 ⁠ of a turn, or complete rotation, one arcminute is ⁠ 1 / 21 600 ⁠ of a turn.

  3. Grade (slope) - Wikipedia

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

    A larger number indicates higher or steeper degree of "tilt". ... The 50‰ grade is equivalent to 50 m/km or 5%. ... 14.0° 25%: 250‰ ...

  4. Sperry–Piltz Ice Accumulation Index - Wikipedia

    en.wikipedia.org/wiki/Sperry–Piltz_Ice...

    The Sperry–Piltz Ice Accumulation Index, or SPIA Index, is a scale for rating ice storm intensity, based on the expected footprint of an ice storm, the expected ice accumulation as a result of a storm, and the expected damage a storm inflicts on human-built structures, especially exposed overhead utility systems such as power lines.

  5. Visibility - Wikipedia

    en.wikipedia.org/wiki/Visibility

    The international definition of fog is a visibility of less than 1 km (3,300 ft); mist is a visibility of between 1 km (0.62 mi) and 2 km (1.2 mi) and haze from 2 km (1.2 mi) to 5 km (3.1 mi). Fog and mist are generally assumed to be composed principally of water droplets, haze and smoke can be of smaller particle size.

  6. Milliradian - Wikipedia

    en.wikipedia.org/wiki/Milliradian

    A milliradian (SI-symbol mrad, sometimes also abbreviated mil) is an SI derived unit for angular measurement which is defined as a thousandth of a radian (0.001 radian). ). Milliradians are used in adjustment of firearm sights by adjusting the angle of the sight compared to the barrel (up, down, left, or

  7. Spatial resolution - Wikipedia

    en.wikipedia.org/wiki/Spatial_resolution

    In physics and geosciences, the term spatial resolution refers to distance between independent measurements, [1] or the physical dimension that represents a pixel of the image.

  8. Kelvin - Wikipedia

    en.wikipedia.org/wiki/Kelvin

    It may be in plural form as appropriate (for example, "it is 283 kelvins outside", as for "it is 50 degrees Fahrenheit" and "10 degrees Celsius"). [ 54 ] [ 5 ] [ 55 ] [ 56 ] The unit's symbol K is a capital letter, [ 39 ] per the SI convention to capitalize symbols of units derived from the name of a person. [ 57 ]

  9. Earth's rotation - Wikipedia

    en.wikipedia.org/wiki/Earth's_rotation

    For example, the Kennedy Space Center is located at latitude 28.59° N, which yields a speed of: cos(28.59°) × 1,674.4 km/h = 1,470.2 km/h. Latitude is a placement consideration for spaceports . While Everest is Earth's highest elevation (green) and Mauna Kea is tallest from its base (orange), Cayambe is farthest from Earth's axis (pink) and ...