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  2. Chevrolet small-block engine (first- and second-generation)

    en.wikipedia.org/wiki/Chevrolet_small-block...

    This block is one of three displacements, 302/327/350, that underwent a crankshaft bearing diameter transformation for 1968 when the rod-journal size was increased from the 2 in (50.8 mm) diameter small-journal to a 2.1 in (53.3 mm) large-journal and a main-journal size that was increased from 2.3 in (58.4 mm) to 2.45 in (62.2 mm).

  3. List of thermal conductivities - Wikipedia

    en.wikipedia.org/wiki/List_of_thermal_conductivities

    Kozak grain sizes ranged from 0.3 to 1 mm diameter and the density was 0.54 grams ⋅ cm −3. Kozak, M.I. Zhur. Tekh. Fiz., 22 (1), 73–6, 1952. By comparison Sinel'nikov powder is a powder in a vacuum, gran sizes range from 100 to 200 micrometers, the powder density is 1.35 g per cm −3 .

  4. Rhenium - Wikipedia

    en.wikipedia.org/wiki/Rhenium

    Because of the low availability relative to demand, rhenium is expensive, with price reaching an all-time high in 2008–09 of US$10,600 per kilogram (US$4,800 per pound). As of 2018, its price had dropped to US$2,844 per kilogram (US$1,290 per pound) due to increased recycling and a drop in demand for rhenium catalysts.

  5. Fuel economy in aircraft - Wikipedia

    en.wikipedia.org/wiki/Fuel_economy_in_aircraft

    The payload fraction of modern twin-aisle aircraft is 18.4% to 20.8% of their maximum take-off weight, while single-aisle airliners are between 24.9% and 27.7%. An aircraft weight can be reduced with light-weight materials such as titanium, carbon fiber and other composite plastics if the expense can be recouped over the aircraft's lifetime.

  6. Hydrogen - Wikipedia

    en.wikipedia.org/wiki/Hydrogen

    Hydrogen gas is very rare in Earth's atmosphere (around 0.53 ppm on a molar basis [99]) because of its light weight, which enables it to escape the atmosphere more rapidly than heavier gases. However, hydrogen is the third most abundant element on the Earth's surface, [ 100 ] mostly in the form of chemical compounds such as hydrocarbons and water.

  7. Human nutrition - Wikipedia

    en.wikipedia.org/wiki/Human_nutrition

    Children born at low birth weight (less than 5.5 pounds or 2.5 kg), are less likely to be healthy and are more susceptible to disease and early death. [2] Those born at low birth weight also are likely to have a depressed immune system, which can increase their chances of heart disease and diabetes later on in life. [ 2 ]

  8. Largest and heaviest animals - Wikipedia

    en.wikipedia.org/wiki/Largest_and_heaviest_animals

    Size of Paraceratherium (dark grey) compared to a human and other rhinos (though one study suggests Palaeoloxodon namadicus may have been a larger land mammal). The blue whale is the largest mammal of all time, with the longest known specimen being 33 m (108.3 ft) long and the heaviest weighted specimen being 190 tonnes.

  9. Nikola Tesla - Wikipedia

    en.wikipedia.org/wiki/Nikola_Tesla

    Tesla's rebuilt birth house (parish hall) and the church where his father served in Smiljan, Croatia.The site was made into a museum to honor him. [7]Nikola Tesla was born into an ethnic Serb family in the village of Smiljan, within the Military Frontier, in the Austrian Empire (present-day Croatia), on 10 July 1856.