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  2. Vernier scale - Wikipedia

    en.wikipedia.org/wiki/Vernier_scale

    So for a vernier with a constant of 0.1, each mark on the vernier is spaced 9/10 of those on the main scale. If you put the two scales together with zero points aligned, the first mark on the vernier scale is 1/10 short of the first main scale mark, the second is 2/10 short, and so on up to the ninth mark, which is misaligned by 9/10.

  3. Least count - Wikipedia

    en.wikipedia.org/wiki/Least_Count

    In the science of measurement, the least count of a measuring instrument is the smallest value in the measured quantity that can be resolved on the instrument's scale. [1] The least count is related to the precision of an instrument; an instrument that can measure smaller changes in a value relative to another instrument, has a smaller "least ...

  4. Pierre Vernier - Wikipedia

    en.wikipedia.org/wiki/Pierre_Vernier

    The main scale reading is the rightmost graduation that is to the left of the zero on the vernier scale. The vernier reading is found by locating the best aligned lines between the two scales. The 0.02 mm engraving indicates the caliper's accuracy and is the "Vernier constant" for this scale. He was born in Ornans, France, in 1580. He was ...

  5. Traveling microscope - Wikipedia

    en.wikipedia.org/wiki/Traveling_microscope

    Both vernier reading to 0.01mm or 0.02mm. Microscope tube consists of 10x Eyepice and 15mm or 50mm or 75mm objectives. The microscope, with its rack and pinion attachment, is mounted on a vertical slide, which also runs with an attached vernier along the vertical scale. The microscope is free to rotate n vertical plane.

  6. List of mathematical constants - Wikipedia

    en.wikipedia.org/wiki/List_of_mathematical_constants

    For example, the constant π may be defined as the ratio of the length of a circle's circumference to its diameter. The following list includes a decimal expansion and set containing each number, ordered by year of discovery. The column headings may be clicked to sort the table alphabetically, by decimal value, or by set.

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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!

  8. Some experts say Santa’s ‘naughty or nice’ list can be ...

    www.aol.com/experts-santa-naughty-nice-list...

    Some mental health experts, however, say characterizing children as "good" or "bad" on a list can limit personal growth and inflict shame, sometimes for developmentally appropriate behavior.

  9. World’s oldest person Tomiko Itooka dies; Brazilian nun now ...

    www.aol.com/world-oldest-person-tomiko-itooka...

    Tomiko Itooka, who became the world's oldest living person, died last week at age 116. Brazilian nun Inah Canabarro Lucas is now the new world's oldest person.