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  2. Naismith's rule - Wikipedia

    en.wikipedia.org/wiki/Naismith's_rule

    So, for example, if a route is 20 kilometres (12 mi) with 1600 metres of climb (as is the case on leg 1 of the Bob Graham Round, Keswick to Threlkeld), the equivalent flat distance of this route is 20+(1.6×8)=32.8 kilometres (20.4 mi). Assuming an individual can maintain a speed on the flat of 5 km/h, the route will take 6 hours and 34 minutes.

  3. Carbon dioxide - Wikipedia

    en.wikipedia.org/wiki/Carbon_dioxide

    At a pressure of 1 atm (0.101325 MPa), the gas deposits directly to a solid at temperatures below 194.6855(30) K [2] (−78.4645(30) °C) and the solid sublimes directly to a gas above this temperature. In its solid state, carbon dioxide is commonly called dry ice. Pressure–temperature phase diagram of carbon dioxide. Note that it is a log ...

  4. Data analysis - Wikipedia

    en.wikipedia.org/wiki/Data_analysis

    A bar chart may be used to show the comparison across the salespersons. [52] Part-to-whole: Categorical subdivisions are measured as a ratio to the whole (i.e., a percentage out of 100%). A pie chart or bar chart can show the comparison of ratios, such as the market share represented by competitors in a market. [53]

  5. List of radioactive nuclides by half-life - Wikipedia

    en.wikipedia.org/wiki/List_of_radioactive...

    14.1 51 radon-211: 14.6 53 sodium-24: 14.96 53.9 americium-242: 16.02 57.7 fermium-255: 20.07 72.3 lead-200: 21.5 77 protactinium-228: 22 79 neptunium-236m: 22.5 81 berkelium-248m: 23.7 85 days 10 3 seconds fermium-252: 1.058 91.4 thorium-231: 1.0634 91.88 dubnium-268: 1.283 110.9 erbium-160: 1.191 102.9 actinium-226: 1.2238 105.74 protactinium ...

  6. Percentile - Wikipedia

    en.wikipedia.org/wiki/Percentile

    Each standard deviation represents a fixed percentile. Thus, rounding to two decimal places, −3σ is the 0.13th percentile, −2σ the 2.28th percentile, −1σ the 15.87th percentile, 0σ the 50th percentile (both the mean and median of the distribution), +1σ the 84.13th percentile, +2σ the 97.72nd percentile, and +3σ the 99

  7. Equilibrium moisture content - Wikipedia

    en.wikipedia.org/wiki/Equilibrium_moisture_content

    The moisture content that is safe for long-term storage is 12% for corn, sorghum, rice and wheat and 11% for soybean [1] At a constant relative humidity of air, the EMC will drop by about 0.5% for every increase of 10 °C air temperature.

  8. Water - Wikipedia

    en.wikipedia.org/wiki/Water

    The refractive index of liquid water (1.333 at 20 °C (68 °F)) is much higher than that of air (1.0), similar to those of alkanes and ethanol, but lower than those of glycerol (1.473), benzene (1.501), carbon disulfide (1.627), and common types of glass (1.4 to 1.6). The refraction index of ice (1.31) is lower than that of liquid water.

  9. Steel - Wikipedia

    en.wikipedia.org/wiki/Steel

    As more steel is produced than is scrapped, the amount of recycled raw materials is about 40% of the total of steel produced – in 2016, 1,628,000,000 tonnes (1.602 × 10 9 long tons; 1.795 × 10 9 short tons) of crude steel was produced globally, with 630,000,000 tonnes (620,000,000 long tons; 690,000,000 short tons) recycled.