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  2. Smith chart - Wikipedia

    en.wikipedia.org/wiki/Smith_chart

    Therefore, transformations P 1 to Q 1 and P 3 to Q 3 are from the Z Smith chart to the Y Smith chart and transformation Q 2 to P 2 is from the Y Smith chart to the Z Smith chart. The following table shows the steps taken to work through the remaining components and transformations, returning eventually back to the centre of the Smith chart and ...

  3. Oral rehydration therapy - Wikipedia

    en.wikipedia.org/wiki/Oral_rehydration_therapy

    Oral rehydration therapy (ORT) is a type of fluid replacement used to prevent and treat dehydration, especially due to diarrhea. [1] It involves drinking water with modest amounts of sugar and salts, specifically sodium and potassium. [1]

  4. pH - Wikipedia

    en.wikipedia.org/wiki/PH

    The neutral value of the pH depends on the temperature and is lower than 7 if the temperature increases above 25 °C. The pH range is commonly given as zero to 14, but a pH value can be less than 0 for very concentrated strong acids or greater than 14 for very concentrated strong bases. [2]

  5. Prandtl number - Wikipedia

    en.wikipedia.org/wiki/Prandtl_number

    Typical values for Pr are: 0.003 for molten potassium at 975 K [1] around 0.015 for mercury; 0.065 for molten lithium at 975 K [1] around 0.16–0.7 for mixtures of noble gases or noble gases with hydrogen; 0.63 for oxygen [1] around 0.71 for air and many other gases; 1.38 for gaseous ammonia [1] between 4 and 5 for R-12 refrigerant; around 7. ...

  6. Iron - Wikipedia

    en.wikipedia.org/wiki/Iron

    Iron is a chemical element; it has the symbol Fe (from Latin ferrum 'iron') and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, forming much of Earth's outer and inner core.

  7. 555 timer IC - Wikipedia

    en.wikipedia.org/wiki/555_timer_IC

    A second resistor in parallel, the new timing is half the table time. A second resistor in series, the new timing is double the table time. 2.5 ms (0.25x) ≅ 100 nF and 22.75 kΩ (four 91 kΩ resistors in parallel), 5 ms (0.5x) ≅ 100 nF and 45.5 kΩ (two 91 kΩ resistors in parallel), 10 ms (1x) ≅ 100 nF and 91 kΩ (values from table),

  8. Oxygen - Wikipedia

    en.wikipedia.org/wiki/Oxygen

    Oxygen is the third most abundant chemical element in the universe, after hydrogen and helium. [68] About 0.9% of the Sun's mass is oxygen. [19] Oxygen constitutes 49.2% of the Earth's crust by mass [69] as part of oxide compounds such as silicon dioxide and is the most abundant element by mass in the Earth's crust.

  9. Carbon monoxide - Wikipedia

    en.wikipedia.org/wiki/Carbon_monoxide

    Carbon monoxide (chemical formula CO) is a poisonous, flammable gas that is colorless, odorless, tasteless, and slightly less dense than air.Carbon monoxide consists of one carbon atom and one oxygen atom connected by a triple bond.