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2. Centimetre or millimetre of water - Wikipedia

   en.wikipedia.org/wiki/Centimetre_or_millimetre...

   A centimetre of water [1] is a unit of pressure. It may be defined as the pressure exerted by a column of water of 1 cm in height at 4 °C (temperature of maximum density) at the standard acceleration of gravity, so that 1 cmH 2 O (4°C) = 999.9720 kg/m 3 × 9.80665 m/s 2 × 1 cm = 98.063754138 Pa ≈ 98.0638 Pa, but conventionally a nominal maximum water density of 1000 kg/m 3 is used, giving ...

3. Inch of water - Wikipedia

   en.wikipedia.org/wiki/Inch_of_water

   It is defined as the pressure exerted by a column of water of 1 inch in height at defined conditions. At a temperature of 4 °C (39.2 °F) pure water has its highest density (1000 kg/m 3). At that temperature and assuming the standard acceleration of gravity, 1 inAq is approximately 249.082 pascals (0.0361263 psi). [2]

4. List of conversion factors - Wikipedia

   en.wikipedia.org/wiki/List_of_conversion_factors

   ≡ 1 ft/h = 8.4 6 × 10 −5 m/s foot per minute: fpm ≡ 1 ft/min = 5.08 × 10 −3 m/s: foot per second: fps ≡ 1 ft/s = 3.048 × 10 −1 m/s: furlong per fortnight: ≡ furlong/fortnight ≈ 1.663 095 × 10 −4 m/s: inch per hour: iph ≡ 1 in/h = 7.0 5 × 10 −6 m/s inch per minute: ipm ≡ 1 in/min = 4.2 3 × 10 −4 m/s inch per ...

5. Rain gauge - Wikipedia

   en.wikipedia.org/wiki/Rain_gauge

   The standard United States National Weather Service rain gauge, developed at the start of the 20th century, consists of an 8 in (200 mm) funnel emptying into a graduated cylinder, 2.525 in (64.1 mm) in diameter, which fits inside a larger container that is 8 in (200 mm) in diameter and 20 in (510 mm) tall. If the rainwater overflows the ...

6. Live steam - Wikipedia

   en.wikipedia.org/wiki/Live_steam

   For instance, scales of 1.5, 1.6, 2.5, and 3 inches per foot (corresponding to scales of 1:8 to 1:4) have been used on a 7 + 1 ⁄ 2 in (190.5 mm) track gauge. The generally accepted smallest gauge for a live steam locomotive is O scale. Producing smaller-scale models remains problematic, as the laws of physics do not themselves scale: creating ...

7. Precipitation - Wikipedia

   en.wikipedia.org/wiki/Precipitation

   The inner cylinder is filled by 2.5 cm (0.98 in) of rain, with overflow flowing into the outer cylinder. Plastic gauges have markings on the inner cylinder down to 1 ⁄ 4 mm (0.0098 in) resolution, while metal gauges require use of a stick designed with the appropriate 1 ⁄ 4 mm (0.0098 in) markings. After the inner cylinder is filled, the ...