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2. QR code - Wikipedia

   en.wikipedia.org/wiki/QR_code

   The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; the pattern of position detection was found and determined by applying the least-used ratio (1:1:3:1:1) in black ...

3. Cogeneration - Wikipedia

   en.wikipedia.org/wiki/Cogeneration

   By-product heat at moderate temperatures (100–180 °C (212–356 °F) can also be used in absorption refrigerators for cooling. The supply of high-temperature heat first drives a gas or steam turbine-powered generator. The resulting low-temperature waste heat is then used for water or space heating.

4. Percentage - Wikipedia

   en.wikipedia.org/wiki/Percentage

   Percentage. In mathematics, a percentage (from Latin per centum 'by a hundred') is a number or ratio expressed as a fraction of 100. It is often denoted using the percent sign (%), [1] although the abbreviations pct., pct, and sometimes pc are also used. [2] A percentage is a dimensionless number (pure number), primarily used for expressing ...

5. 100% renewable energy - Wikipedia

   en.wikipedia.org/wiki/100%_renewable_energy

   100% renewable energy is an energy system where all energy use is sourced from renewable energy sources. The endeavor to use 100% renewable energy for electricity, heating/cooling and transport is motivated by global warming, pollution and other environmental issues, as well as economic and energy security concerns.

6. Polypropylene - Wikipedia

   en.wikipedia.org/wiki/Polypropylene

   Atactic polypropylene has lower density, melting point and softening temperature than the crystalline types and is tacky and rubber-like at room temperature. It is a colorless, cloudy material and can be used between −15 and +120 °C. Atactic polypropylene is used as a sealant, as an insulating material for automobiles and as an additive to ...

7. Speed limit - Wikipedia

   en.wikipedia.org/wiki/Speed_limit

   Decrease speed from 100 to 90 km/h (62 to 56 mph) In Spain the year 2019 was the best year with the fewest people killed outside a built-up area. The number of people killed outside built-up areas decreased by 7.6% while the number of people killed on regular roads decreased by 9.5%.

8. Freshman 15 - Wikipedia

   en.wikipedia.org/wiki/Freshman_15

   Freshman 15. The term " Freshman 15 " is an expression commonly used in the United States and Canada to refer to weight gain during a student's first year in college. Although the 15 refers to a 15 lb (6.8 kg) weight gain, the expression can apply more generally. In Australia and New Zealand, it is sometimes referred to as " First Year Fatties ...