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  2. Base ten blocks - Wikipedia

    en.wikipedia.org/wiki/Base_ten_blocks

    Wooden Dienes blocks in units of 1, 10, 100 and 1000 Plastic Dienes blocks in use. Base ten blocks, also known as Dienes blocks after popularizer Zoltán Dienes (Hungarian: [ˈdijɛnɛʃ]), are a mathematical manipulative used by students to practice counting and elementary arithmetic and develop number sense in the context of the decimal place-value system as a more concrete and direct ...

  3. Positional notation - Wikipedia

    en.wikipedia.org/wiki/Positional_notation

    Positional notation, also known as place-value notation, ... (3 0 and 3 3) on the other, then its weight in decimal is 25 or 10 1 1 in balanced base-3.

  4. Decimal balance - Wikipedia

    en.wikipedia.org/wiki/Decimal_balance

    Old decimal balance scale A drawing to illustrate a design with two-point support of the platform. A decimal balance or decimal scale is a balance scale which uses the lever in which the arm for weights is 10 times longer than the arm for weighted objects, so that much lighter weights may be used to weigh heavy object. [1]

  5. Significant figures - Wikipedia

    en.wikipedia.org/wiki/Significant_figures

    The leftmost or largest digit position among the last significant figures of these terms is the ones place, so the calculated result should also have its last significant figure in the ones place. The rule to calculate significant figures for multiplication and division are not the same as the rule for addition and subtraction.

  6. Cavendish experiment - Wikipedia

    en.wikipedia.org/wiki/Cavendish_experiment

    After converting to SI units, Cavendish's value for the Earth's density, 5.448 g cm −3, gives G = 6.74 × 10 −11 m 3 kg –1 s −2, [24] which differs by only 1% from the 2014 CODATA value of 6.67408 × 10 −11 m 3 kg −1 s −2. [25] Today, physicists often use units where the gravitational constant takes a different form.

  7. Gravity of Earth - Wikipedia

    en.wikipedia.org/wiki/Gravity_of_Earth

    This quantity is denoted variously as g n, g e (though this sometimes means the normal gravity at the equator, 9.7803267715 m/s 2 (32.087686258 ft/s 2)), [5] g 0, or simply g (which is also used for the variable local value). The weight of an object on Earth's surface is the downwards force on that object, given by Newton's second law of motion ...

  8. Gravitational field - Wikipedia

    en.wikipedia.org/wiki/Gravitational_field

    A gravitational field is used to explain gravitational phenomena, such as the gravitational force field exerted on another massive body. It has dimension of acceleration (L/T 2) and it is measured in units of newtons per kilogram (N/kg) or, equivalently, in meters per second squared (m/s 2). In its original concept, gravity was a force between ...

  9. Weight-bearing - Wikipedia

    en.wikipedia.org/wiki/Weight-bearing

    Touch-down weight-bearing or Toe-touch weight-bearing: The foot or toes may touch the floor (such as to maintain balance), but not support any weight. [3] Do not place actual weight on the affected leg. Imagine having an egg underfoot that one is not to crush. Partial weight-bearing: A small amount of weight may be supported by the affected leg ...

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