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2. Weighing scale - Wikipedia

   en.wikipedia.org/wiki/Weighing_scale

   The balance (also balance scale, beam balance and laboratory balance) was the first mass measuring instrument invented. [1] In its traditional form, it consists of a pivoted horizontal lever with arms of equal length – the beam or tron – and a weighing pan [ 10 ] suspended from each arm (hence the plural name " scales " for a weighing ...

3. Roberval balance - Wikipedia

   en.wikipedia.org/wiki/Roberval_Balance

   A Roberval balance made by W & T Avery Ltd. in England Detail: the bottom horizontal beam is hidden under the protective cover A Roberval balance shown responding to two masses of equal weight. The Roberval balance is a weighing scale presented to the French Academy of Sciences by the French mathematician Gilles Personne de Roberval in 1669.

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. Balance scales - Wikipedia

   en.wikipedia.org/?title=Balance_scales&redirect=no

   Weighing scale#Balance To a section : This is a redirect from a topic that does not have its own page to a section of a page on the subject. For redirects to embedded anchors on a page, use {{ R to anchor }} instead .

6. Balance puzzle - Wikipedia

   en.wikipedia.org/wiki/Balance_puzzle

   A balance puzzle or weighing puzzle is a logic puzzle about balancing items—often coins—to determine which one has different weight than the rest, by using balance scales a limited number of times. The solution to the most common puzzle variants is summarized in the following table: [1]

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