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  2. Firewood - Wikipedia

    en.wikipedia.org/wiki/Firewood

    More unusual, and dangerous, is a tapered screw-style design, that augers into the wood, splitting it, and can be powered by either a power take-off drive, a dedicated internal combustion engine, or a rugged electric pipe-threading machine, which is safer than the other power sources because the power can be shut off more easily if necessary ...

  3. Airplane - Wikipedia

    en.wikipedia.org/wiki/Airplane

    Etymology and usage. First attested in English in the late 19th century (prior to the first sustained powered flight), the word airplane, like aeroplane, derives from the French aéroplane, which comes from the Greek ἀήρ (aēr), "air" and either Latin planus, "level", or Greek πλάνος (planos), "wandering".

  4. Transperth Train Operations - Wikipedia

    en.wikipedia.org/wiki/Transperth_Train_Operations

    The Fremantle to Guildford line commenced operating as a steam-powered service in March 1881, followed by the Perth to Armadale line in May 1889, and the Perth to Joondalup line (now Butler) in 1993 and the Perth to Mandurah line in December 2007. The Fremantle line service ceased in September 1979 but was reinstated in July 1983.

  5. Machine - Wikipedia

    en.wikipedia.org/wiki/Machine

    The Boulton and Watt steam engine and later designs powered steam locomotives, steam ships, and factories. The Industrial Revolution was a period from 1750 to 1850 where changes in agriculture, manufacturing, mining, transportation, and technology had a profound effect on the social, economic and cultural conditions of the times.

  6. Sonar - Wikipedia

    en.wikipedia.org/wiki/Sonar

    When active sonar is used, scattering occurs from small objects in the sea as well as from the bottom and surface. This can be a major source of interference. This acoustic scattering is analogous to the scattering of the light from a car's headlights in fog: a high-intensity pencil beam will penetrate the fog to some extent, but broader-beam headlights emit much light in unwanted directions ...