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  2. Hard water - Wikipedia

    en.wikipedia.org/wiki/Hard_water

    In domestic settings, hard water is often indicated by a lack of foam formation when soap is agitated in water, and by the formation of limescale in kettles and water heaters. [2] Wherever water hardness is a concern, water softening is commonly used to reduce hard water's adverse effects.

  3. TDS Telecom - Wikipedia

    en.wikipedia.org/wiki/TDS_Telecom

    TDS Telecom is an American telecommunications company with headquarters in Madison, Wisconsin.It is a wholly owned subsidiary of Telephone and Data Systems Inc, and is the seventh-largest local exchange carrier in the U.S. TDS Telecom offers telephone, broadband Internet and television services to customers in 30 states and more than 900 rural and suburban communities, though it also serves ...

  4. Transient-voltage-suppression diode - Wikipedia

    en.wikipedia.org/wiki/Transient-voltage...

    A transient-voltage-suppression diode can respond to over-voltages faster than other common over-voltage protection components such as varistors or gas discharge tubes. The actual clamping occurs in roughly one picosecond, but in a practical circuit the inductance of the wires leading to the device imposes a higher limit.

  5. Passer rating - Wikipedia

    en.wikipedia.org/wiki/Passer_rating

    Passer rating (also known as passing efficiency in college football) is a measure of the performance of passers, primarily quarterbacks, in gridiron football. There are two formulas currently in use: one used by both the National Football League (NFL) and Canadian Football League (CFL), and the other used in NCAA football.

  6. Sinn Féin - Wikipedia

    en.wikipedia.org/wiki/Sinn_Féin

    t. e. Sinn Féin ( / ʃɪn ˈfeɪn / shin FAYN, [19] Irish: [ˌʃɪn̠ʲ ˈfʲeːnʲ] ⓘ ; English: " [We] Ourselves") [20] is an Irish republican [6] and democratic socialist [7] political party in both the Republic of Ireland and Northern Ireland . The original Sinn Féin organisation was founded in 1905 by Arthur Griffith.

  7. Transgender - Wikipedia

    en.wikipedia.org/wiki/Transgender

    t. e. A transgender person (often shortened to trans person) is someone whose gender identity differs from that typically associated with the sex they were assigned at birth. [1] Some transgender people who desire medical assistance to transition from one sex to another identify as transsexual.

  8. Social Democrats (Ireland) - Wikipedia

    en.wikipedia.org/wiki/Social_Democrats_(Ireland)

    The Social Democrats ( Irish: Na Daonlathaithe Sóisialta) [5] are a centre-left, [4] [6] social-democratic political party in Ireland. [3] Led by Holly Cairns, the party was launched on 15 July 2015 by three independent TDs, Catherine Murphy, and Róisín Shortall, and Stephen Donnelly. It promotes the Nordic model [7] and pro-European views.

  9. Arithmetic mean - Wikipedia

    en.wikipedia.org/wiki/Arithmetic_mean

    The arithmetic mean of a set of observed data is equal to the sum of the numerical values of each observation, divided by the total number of observations. Symbolically, for a data set consisting of the values , the arithmetic mean is defined by the formula: [2] (For an explanation of the summation operator, see summation .)