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  2. METAR - Wikipedia

    en.wikipedia.org/wiki/METAR

    M04/M07 indicates the temperature is −4 °C (25 °F) and the dew point is −7 °C (19 °F). An M in front of the number indicates that the temperature/dew point is below zero Celsius. Q1020 indicates the current altimeter setting (in QNH) is 1,020 hPa (30.12 inHg).

  3. Temperature - Wikipedia

    en.wikipedia.org/wiki/Temperature

    Temperature is a physical quantity that quantitatively expresses the attribute of hotness or coldness. Temperature is measured with a thermometer. It reflects the average kinetic energy of the vibrating and colliding atoms making up a substance.

  4. Celsius - Wikipedia

    en.wikipedia.org/wiki/Celsius

    Since 2007, the Celsius temperature scale has been defined in terms of the kelvin, the SI base unit of thermodynamic temperature (symbol: K). Absolute zero, the lowest temperature, is now defined as being exactly 0 K and −273.15 °C. Countries by usage

  5. National Electrical Code - Wikipedia

    en.wikipedia.org/wiki/National_Electrical_Code

    Temperature rating. The temperature rating of a wire or cable is generally the maximum safe ambient temperature that the wire can carry full-load power without the cable insulation melting, oxidizing, or self-igniting.

  6. Standard temperature and pressure - Wikipedia

    en.wikipedia.org/wiki/Standard_temperature_and...

    NIST uses a temperature of 20 °C (293.15 K, 68 °F) and an absolute pressure of 1 atm (14.696 psi, 101.325 kPa). This standard is also called normal temperature and pressure (abbreviated as NTP ). However, a common temperature and pressure in use by NIST for thermodynamic experiments is 298.15 K (25° C , 77° F ) and 1 bar (14.5038 psi , 100 ...

  7. Temperature measurement - Wikipedia

    en.wikipedia.org/wiki/Temperature_measurement

    Temperature measurement (also known as thermometry) describes the process of measuring a current temperature for immediate or later evaluation. Datasets consisting of repeated standardized measurements can be used to assess temperature trends.

  8. List of weather records - Wikipedia

    en.wikipedia.org/wiki/List_of_weather_records

    This is a list of weather records, a list of the most extreme occurrences of weather phenomena for various categories. Many weather records are measured under specific conditions—such as surface temperature and wind speed—to keep consistency among measurements around the Earth.

  9. Global temperature record - Wikipedia

    en.wikipedia.org/wiki/Global_temperature_record

    The global temperature record shows the fluctuations of the temperature of the atmosphere and the oceans through various spans of time. There are numerous estimates of temperatures since the end of the Pleistocene glaciation , particularly during the current Holocene epoch.

  10. Temperature coefficient - Wikipedia

    en.wikipedia.org/wiki/Temperature_coefficient

    A temperature coefficient describes the relative change of a physical property that is associated with a given change in temperature. For a property R that changes when the temperature changes by dT, the temperature coefficient α is defined by the following equation:

  11. Steel grades - Wikipedia

    en.wikipedia.org/wiki/Steel_grades

    Temperature Impact code Testing strength Temperature code Testing temperature J: 27 J: R: Room temperature K: 40 J: 0: 0 °C L: 60 J: 2-20 °C 3-30 °C 4-40 °C 5-50 °C 6-60 °C