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  2. Swimming pool - Wikipedia

    en.wikipedia.org/wiki/Swimming_pool

    This is an accepted version of this page This is the latest accepted revision, reviewed on 31 January 2025. Artificial water basin for swimming For other uses, see Swimming pool (disambiguation). Backyard swimming pool Olympic-size swimming pool and starting blocks at Melbourne Sports and Aquatic Centre used for the 2006 Commonwealth Games in Melbourne, Australia A swimming pool, swimming bath ...

  3. Solar water heating - Wikipedia

    en.wikipedia.org/wiki/Solar_water_heating

    An advertisement for a Solar Water Heater dating to 1902 Frank Shuman's sunengine on the March 1916 cover of Hugo Gernsback's The Electrical Experimenter. Records of solar collectors in the United States date to before 1900, [5] involving a black-painted tank mounted on a roof. In 1896 Clarence Kemp of Baltimore enclosed a tank in a wooden box ...

  4. Manhole cover - Wikipedia

    en.wikipedia.org/wiki/Manhole_cover

    A round manhole and its cover. A manhole cover is a removable plate forming the lid over the opening of a manhole, an opening large enough for a person to pass through that is used as an access point for an underground vault or pipe. It is designed to prevent anyone or anything from falling in, and to keep out unauthorized persons and material.

  5. Glossary of agriculture - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_agriculture

    (pl.) aboiteaux A sluice or conduit built beneath a coastal dike, with a hinged gate or a one-way valve that closes during high tide, preventing salt water from flowing into the sluice and flooding the land behind the dike, but remains open during low tide, allowing fresh water precipitation and irrigation runoff to drain from the land into the sea; or a method of land reclamation which relies ...

  6. Finland - Wikipedia

    en.wikipedia.org/wiki/Finland

    Finland covers a total area of 338,145 square kilometres (130,559 sq mi), including a land area of 303,815 square kilometres (117,304 sq mi), [4] and has a population of 5.6 million. [10] Helsinki is the capital and largest city.

  7. Moon - Wikipedia

    en.wikipedia.org/wiki/Moon

    The full moon is highest in the sky during winter and lowest during summer (for each hemisphere respectively), with its altitude changing towards dark moon to the opposite. At the North and South Poles the Moon is 24 hours above the horizon for two weeks every tropical month (about 27.3 days), comparable to the polar day of the tropical year.

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