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  2. Grade (climbing) - Wikipedia

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

    Peak B-grades are roughly one level easier than V-grades (e.g. V8 was equivalent to B9). The V-grade / Font-grade systems (sometimes the "technical grade" component of the British E-grade system is used) have replaced Peak B-grades in Britain but they appear in some guidebooks and some boulder grade conversion tables. [3] [10] [19]

  3. Hardness comparison - Wikipedia

    en.wikipedia.org/wiki/Hardness_comparison

    Hardness Conversion Table – Brinell, Rockwell,Vickers – Various steels . (archived November 11, 2011) Rockwell to Brinell conversion chart (Brinell, Rockwell A,B,C) Struers hardness conversion table (Vickers, Brinell, Rockwell B,C,D)

  4. List of grade milestones in rock climbing - Wikipedia

    en.wikipedia.org/wiki/List_of_grade_milestones...

    The notable first ascents that set a new highest-grade prior to The Face were traditional climbing routes: . 8a (5.13b) [m]. Grand Illusion – Sugar Loaf, Lake Tahoe, CA – 1979 – First-ever consensus 8a (5.13b) in history, by Tony Yaniro.

  5. Conversion of units - Wikipedia

    en.wikipedia.org/wiki/Conversion_of_units

    The factor–label method can convert only unit quantities for which the units are in a linear relationship intersecting at 0 (ratio scale in Stevens's typology). Most conversions fit this paradigm. An example for which it cannot be used is the conversion between the Celsius scale and the Kelvin scale (or the Fahrenheit scale). Between degrees ...

  6. List of conversion factors - Wikipedia

    en.wikipedia.org/wiki/List_of_conversion_factors

    Magnetic flux which, linking a circuit of one turn, would produce in it an electromotive force of 1 volt if it were reduced to zero at a uniform rate in 1 second. [ 32 ] = 1 Wb = 1 V⋅s = 1 kg⋅m 2 /(A⋅s 2 )

  7. California health department reports possible bird flu case ...

    www.aol.com/news/california-health-department...

    (Reuters) -California's public health department reported a possible case of bird flu in a child with mild respiratory symptoms on Tuesday, but said there was no evidence of human-to-human ...

  8. Energy conversion efficiency - Wikipedia

    en.wikipedia.org/wiki/Energy_conversion_efficiency

    Energy conversion efficiency (η) is the ratio between the useful output of an energy conversion machine and the input, in energy terms. The input, as well as the useful output may be chemical, electric power, mechanical work, light (radiation), or heat. The resulting value, η (eta), ranges between 0 and 1. [1] [2] [3]

  9. Almen strip - Wikipedia

    en.wikipedia.org/wiki/Almen_strip

    An Almen strip is a thin strip of SAE 1070 steel used to quantify the intensity of a shot peening process.. Developed and patented by John O. Almen, the strip was originally supported by 2 knife edges; later improvements see it being supported on 4 small balls.