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Sloped armour on the front of Soviet T-54 tank, here cut open to demonstrate the increase in effective thickness. Sloped armour is armour that is oriented neither vertically nor horizontally. Such angled armour is typically mounted on tanks and other armoured fighting vehicles (AFVs), as well as naval vessels such as battleships and cruisers.
A crossword (or crossword puzzle) is a word game consisting of a grid of black and white squares, into which solvers enter words or phrases ("entries") crossing each other horizontally ("across") and vertically ("down") according to a set of clues. Each white square is typically filled with one letter, while the black squares are used to ...
The abbreviation is not always a short form of the word used in the clue. For example: "Knight" for N (the symbol used in chess notation) Taking this one stage further, the clue word can hint at the word or words to be abbreviated rather than giving the word itself. For example: "About" for C or CA (for "circa"), or RE.
The larger Sunday crossword, which appears in The New York Times Magazine, is an icon in American culture; it is typically intended to be a "Thursday-plus" in difficulty. [6] The standard daily crossword is 15 by 15 squares, while the Sunday crossword measures 21 by 21 squares.
Lidar ( / ˈlaɪdɑːr /, also LIDAR, LiDAR or LADAR, an acronym of "light detection and ranging" [ 1 ] or "laser imaging, detection, and ranging" [ 2 ]) is a method for determining ranges by targeting an object or a surface with a laser and measuring the time for the reflected light to return to the receiver.
Smaller words may be easier to fit in the grid, but longer words give more clues to connecting words. [10] Care must be given to marking out words that are not explicitly placed in the grid; this occurs when one fills in a vertical sequence of horizontal words, or vice versa.
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The cosmic age problem was a historical problem in astronomy concerning the age of the universe. The problem was that at various times in the 20th century, the universe was estimated to be younger than the oldest observed stars. Estimates of the universe's age came from measurements of the current expansion rate of the universe, the Hubble ...