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2. List of conversion factors - Wikipedia

   en.wikipedia.org/wiki/List_of_conversion_factors

   ≡ 1 atm × 1 cm 3 /min = 1.688 75 × 10 −3 W: atmosphere-cubic centimetre per second: atm ccs [citation needed] ≡ 1 atm × 1 cm 3 /s = 0.101 325 W: atmosphere-cubic foot per hour: atm cfh [citation needed] ≡ 1 atm × 1 cu ft/h = 0.797 001 247 04 W: atmosphere-cubic foot per minute: atm cfm [citation needed] ≡ 1 atm × 1 cu ft/min = 47 ...

3. List of thermal conductivities - Wikipedia

   en.wikipedia.org/wiki/List_of_thermal_conductivities

   Small granite pillars have failed under loads that averaged out to about 1.43 ⋅ 10 8 Newtons/meter 2 and this kind of rock has a sonic speed of about 5.6 ± 0.3 ⋅ 10 3 m/sec (stp), a density of about 2.7 g/cm 3 and specific heat ranging from about 0.2 to 0.3 cal/g °C through the temperature interval 100-1000 °C [Stowe pages 41 & 59 and ...

4. Charge carrier density - Wikipedia

   en.wikipedia.org/wiki/Charge_carrier_density

   Carrier density (1/cm 3) at 300K Copper: 1 8.47 × 10 22: Silver: 1 5.86 × 10 22: Gold: 1 5.90 × 10 22: Beryllium: 2 2.47 × 10 23: Magnesium: 2 8.61 × 10 22: Calcium: 2 4.61 × 10 22: Strontium: 2 3.55 × 10 22: Barium: 2 3.15 × 10 22: Niobium: 1 5.56 × 10 22: Iron: 2 1.70 × 10 23: Manganese: 2 1.65 × 10 23: Zinc: 2 1.32 × 10 23 ...

5. International Annealed Copper Standard - Wikipedia

   en.wikipedia.org/wiki/International_Annealed...

   Sometime around 1913, several copper samples from 14 important refiners and wire manufacturers were analyzed by the U.S. Bureau of Standards. The average resistance of the samples was determined to be 0.15292 Ω for copper wires with a mass of 1 gram of uniform cross section and 1 meter in length at 20 °C. In the United States this is usually ...

6. Equivalent width - Wikipedia

   en.wikipedia.org/wiki/Equivalent_width

   The equivalent width, on the other hand, "measures the fraction of energy removed from the spectrum by the line," regardless of the broadening intrinsic to the line or a detector with poor resolution. [3] Thus the equivalent width can in many conditions yield the number of absorbing or emitting atoms, by using the curve of growth. [1]

7. Printed circuit board - Wikipedia

   en.wikipedia.org/wiki/Printed_circuit_board

   Heavy copper is a layer exceeding three ounces of copper per ft 2, or approximately 4.2 mils (105 μm) (0.0042 inches) thick. Heavy copper layers are used for high current or to help dissipate heat. [citation needed] On the common FR-4 substrates, 1 oz copper per ft 2 (35 μm) is the most common thickness; 2 oz (70 μm) and 0.5 oz (17.5 μm ...