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  2. Water–cement ratio - Wikipedia

    en.wikipedia.org/wiki/Water–cement_ratio

    The water–cement ratio (w/c ratio, or water-to-cement ratio, sometimes also called the Water-Cement Factor, f) is the ratio of the mass of water (w) to the mass of cement (c) used in a concrete mix: The typical values of this ratio f = w⁄c are generally comprised in the interval 0.40 and 0.60. The water-cement ratio of the fresh concrete ...

  3. Two-point conversion - Wikipedia

    en.wikipedia.org/wiki/Two-point_conversion

    In gridiron football, a two-point conversion, two-point convert, or two-point attempt is a play a team attempts instead of kicking a one-point conversion immediately after it scores a touchdown. In a two-point conversion attempt, the team that just scored must run a play from scrimmage close to the opponent's goal line and advance the ball ...

  4. Braintree District - Wikipedia

    en.wikipedia.org/wiki/Braintree_District

    Braintree District is a local government district in Essex, England.The district is named after the town of Braintree, where the council is based.The district also includes the towns of Halstead and Witham and surrounding rural areas.

  5. AOL Mail

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    Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!

  6. Stepped reckoner - Wikipedia

    en.wikipedia.org/wiki/Stepped_reckoner

    The stepped reckoner or Leibniz calculator was a mechanical calculator invented by the German mathematician Gottfried Wilhelm Leibniz (started in 1673, when he presented a wooden model to the Royal Society of London [2] and completed in 1694). [1] The name comes from the translation of the German term for its operating mechanism, Staffelwalze ...

  7. Mortgage points: What are they and how do they work? - AOL

    www.aol.com/finance/mortgage-points-192840885.html

    By buying two points for $6,400 upfront, the borrower’s interest rate shrank to 6.5 percent, lowering their monthly payment by $85, and saving them $30,709 in interest over the life of the loan.

  8. Impervious surface - Wikipedia

    en.wikipedia.org/wiki/Impervious_surface

    Impervious surfaces are an environmental concern because their construction initiates a chain of events that modifies urban air and water resources: The pavement materials seal the soil surface, eliminating rainwater infiltration and natural groundwater recharge. This can cause urban flooding. An article in the Seattle Times states that "while ...

  9. Newmark's influence chart - Wikipedia

    en.wikipedia.org/wiki/Newmark's_influence_chart

    Newmark's influence chart. Newmark's Influence Chart is an illustration used to determine the vertical pressure at any point below a uniformly loaded flexible area of soil of any shape. This method, like others, was derived by integration of Boussinesq's equation for a point load. [1]