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  2. Academic grading in the United States - Wikipedia

    en.wikipedia.org/wiki/Academic_grading_in_the...

    The overall grade for the class is then typically weighted so that the final grade represents a stated proportion of different types of work. For example, daily homework may be counted as 50% of the final grade, chapter quizzes may count for 20%, the comprehensive final exam may count for 20%, [1] and a major project may count for the remaining ...

  3. Problem solving - Wikipedia

    en.wikipedia.org/wiki/Problem_solving

    Problem solving in psychology refers to the process of finding solutions to problems encountered in life. [5] Solutions to these problems are usually situation- or context-specific. The process starts with problem finding and problem shaping, in which the problem is discovered and simplified. The next step is to generate possible solutions and ...

  4. List of mental disorders - Wikipedia

    en.wikipedia.org/wiki/List_of_mental_disorders

    This is an accepted version of this page This is the latest accepted revision, reviewed on 14 December 2024. The following is a list of mental disorders as defined at any point by the Diagnostic and Statistical Manual of Mental Disorders (DSM) or the International Classification of Diseases (ICD). A mental disorder, also known as a mental illness, mental health condition, or psychiatric ...

  5. Three prisoners problem - Wikipedia

    en.wikipedia.org/wiki/Three_Prisoners_problem

    This adds up to the total of ⁠ 1 / 3 ⁠ of the time (⁠ 1 / 6 ⁠ + ⁠ 1 / 6 ⁠) A is being pardoned, which is accurate. It is now clear that if the warden answers B to A ( ⁠ 1 / 2 ⁠ of all cases), then ⁠ 1 / 3 ⁠ of the time C is pardoned and A will still be executed (case 4), and only ⁠ 1 / 6 ⁠ of the time A is pardoned (case 1).

  6. f-number - Wikipedia

    en.wikipedia.org/wiki/F-number

    The f-number N is given by: = where f is the focal length, and D is the diameter of the entrance pupil (effective aperture).It is customary to write f-numbers preceded by "f /", which forms a mathematical expression of the entrance pupil's diameter in terms of f and N. [1]

  7. pH - Wikipedia

    en.wikipedia.org/wiki/PH

    At 25 °C (77 °F), solutions with a pH less than 7 are acidic, and solutions with a pH greater than 7 are basic. Solutions with a pH of 7 at 25 °C are neutral (i.e. have the same concentration of H + ions as OH − ions, i.e. the same as pure water). The neutral value of the pH depends on the temperature and is lower than 7 if the temperature ...

  8. Curtiss P-6 Hawk - Wikipedia

    en.wikipedia.org/wiki/Curtiss_P-6_Hawk

    XP-6 Model 34P, modified from a P-1 with a Curtiss V-1570-17 Conqueror engine XP-6A Model 34K, same as XP-6 but with untapered wings and wing radiators to reduce drag P-6A 18 ordered by the U.S. Army, nine were fitted with Prestone- rather than water-cooled V-1570 engines XP-6B P-1 converted to take the V-1670 engine P-6C cancelled XP-6D

  9. Beechcraft T-6 Texan II - Wikipedia

    en.wikipedia.org/wiki/Beechcraft_T-6_Texan_II

    The Model 3000/T-6 is a low-wing cantilever monoplane with enclosed tandem seating for two. It is powered by a single Pratt & Whitney Canada PT6A-68 turboprop engine in tractor configuration with an aluminum, 97-inch (8.1 ft; 2.5 m), four-blade, constant-speed, variable pitch, non-reversing, feathering propeller assembly and has retractable tricycle landing gear.