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  2. Water metering - Wikipedia

    en.wikipedia.org/wiki/Water_metering

    A typical residential water meter. Water metering is the practice of measuring water use.Water meters measure the volume of water used by residential and commercial building units that are supplied with water by a public water supply system.

  3. Orders of magnitude (volume) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(volume)

    a very fine grain of sand (0.063 mm diameter, 3 micrograms) 1 × 10 −12: One nanolitre 6.2 × 10 −11: A medium grain of sand (0.5 mm diameter, 1.5 milligrams) 5 × 1010: Volume of a poppy seed of 1-millimetre diameter [1] 1 × 10 −9: One cubic millimetre or one microlitre: 4 × 10 −9: Volume of a mustard seed of 2-millimetre ...

  4. Current meter - Wikipedia

    en.wikipedia.org/wiki/Current_meter

    Mechanical current meters are mostly based on counting the rotations of a propeller and are thus rotor current meters. A mid-20th-century realization is the Ekman current meter which drops balls into a container to count the number of rotations.

  5. Geology of Triton - Wikipedia

    en.wikipedia.org/wiki/Geology_of_Triton

    With a mean density of 2.061 g/cm 3, [1] Triton is roughly 15-35% water ice by mass; Triton is a differentiated body, with an icy solid crust atop a probable subsurface ocean and a rocky core. As a result, Triton's surface geology is largely driven by the dynamics of water ice and other volatiles such as nitrogen and methane.

  6. Nominal Pipe Size - Wikipedia

    en.wikipedia.org/wiki/Nominal_Pipe_Size

    Nominal Pipe Size (NPS) is a North American set of standard sizes for pipes used for high or low pressures and temperatures. [1] " Nominal" refers to pipe in non-specific terms and identifies the diameter of the hole with a non-dimensional number (for example – 2-inch nominal steel pipe" consists of many varieties of steel pipe with the only criterion being a 2.375-inch (60.3 mm) outside ...

  7. Flow measurement - Wikipedia

    en.wikipedia.org/wiki/Flow_measurement

    Because they are used for domestic water measurement, piston meters, also known as rotary piston or semi-positive displacement meters, are the most common flow measurement devices in the UK and are used for almost all meter sizes up to and including 40 mm (1 + 1 ⁄ 2 in). The piston meter operates on the principle of a piston rotating within a ...

  8. Neptune - Wikipedia

    en.wikipedia.org/wiki/Neptune

    A size comparison of Neptune and Earth. Neptune's mass of 1.0243 × 10 26 kg [8] is intermediate between Earth and the larger gas giants: it is 17 times that of Earth but just 1/19th that of Jupiter. [g] Its gravity at 1 bar is 11.15 m/s 2, 1.14 times the surface gravity of Earth, [71] and surpassed only by Jupiter. [72]

  9. Orders of magnitude (length) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(length)

    10 6: 1 megameter 2.38 Mm Diameter of dwarf planet Pluto, formerly the smallest planet category [note 2] in the Solar System 3.48 Mm Diameter of the Moon: 5.2 Mm Typical distance covered by the winner of the 24 Hours of Le Mans automobile endurance race 6.259 Mm Length of the Great Wall of China: 6.371 Mm Average radius of Earth: 6.378 Mm