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2. Micrometer (device) - Wikipedia

   en.wikipedia.org/wiki/Micrometer_(device)

   Animation of a micrometer in use. The object being measured is in black. The measurement is 4.140 ± 0.005 mm. Micrometers use the screw to transform small distances [9] (that are too small to measure directly) into large rotations of the screw that are big enough to read from a scale. The accuracy of a micrometer derives from the accuracy of ...

3. List of humorous units of measurement - Wikipedia

   en.wikipedia.org/wiki/List_of_humorous_units_of...

   The unit is used to measure the length of the Harvard Bridge. Canonically, and originally, in 1958 when Smoot was a Lambda Chi Alpha pledge at MIT (class of 1962), the bridge was measured to be 364.4 Smoots, plus or minus one ear, using Mr. Smoot himself as a ruler. [17] At the time, Smoot was 5 feet, 7 inches, or 170 cm, tall. [18]

4. Factor of safety - Wikipedia

   en.wikipedia.org/wiki/Factor_of_safety

   In engineering, a factor of safety (FoS) or safety factor (SF) expresses how much stronger a system is than it needs to be for an intended load.Safety factors are often calculated using detailed analysis because comprehensive testing is impractical on many projects, such as bridges and buildings, but the structure's ability to carry a load must be determined to a reasonable accuracy.

5. Ring size - Wikipedia

   en.wikipedia.org/wiki/Ring_size

   Ring size is a measurement used to denote the circumference (or sometimes the diameter) of jewellery rings and smart rings. Measuring tools ... M: 12: 12.5 0.666:

6. Metrication in the United States - Wikipedia

   en.wikipedia.org/wiki/Metrication_in_the_United...

   Display sizes for screens on TVs and computer monitors are advertised and sold in inches (measured diagonally), although most boxes also state the size in centimeters. The original 1 ⁄ 4 inch (6.35 mm) phone connector jack dates back to 1878 [54] [55] [56] and still sees use in audio equipment and electric instruments. In many respects, it ...

7. Glomerular filtration rate - Wikipedia

   en.wikipedia.org/wiki/Glomerular_filtration_rate

   To allow comparison of results between people of different sizes, the C Cr is often corrected for the body surface area (BSA) and expressed compared to the average sized man as mL/min/1.73 m 2. While most adults have a BSA that approaches 1.7 m 2 (1.6 m 2 to 1.9 m 2), extremely obese or slim patients should have their C Cr corrected for their ...