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  2. Quadrangle (geography) - Wikipedia

    en.wikipedia.org/wiki/Quadrangle_(geography)

    A 7.5 minute quadrangle map covers an area of 49 to 70 square miles (130 to 180 km 2). [2] Both map series were produced via photogrammetric analysis of aerial photography using stereoplotters supplemented by field surveys.

  3. Doubling time - Wikipedia

    en.wikipedia.org/wiki/Doubling_time

    As an example, Canada's net population growth was 2.7 percent in the year 2022, dividing 72 by 2.7 gives an approximate doubling time of about 27 years. Thus if that growth rate were to remain constant, Canada's population would double from its 2023 figure of about 39 million to about 78 million by 2050. [2]

  4. Rule of 72 - Wikipedia

    en.wikipedia.org/wiki/Rule_of_72

    To estimate the number of periods required to double an original investment, divide the most convenient "rule-quantity" by the expected growth rate, expressed as a percentage. For instance, if you were to invest $100 with compounding interest at a rate of 9% per annum, the rule of 72 gives 72/9 = 8 years required for the investment to be worth ...

  5. Hoosier Pass (Continental Divide) - Wikipedia

    en.wikipedia.org/wiki/Hoosier_Pass_(Continental...

    [2] [3] The U.S. Department of Agriculture's Forest Service sign at the Hoosier Pass on the Continental Divide, August 10, 2024 Memorial at the Hoosier Pass on the Continental Divide The pass is located on the Continental Divide at the northern end of the Mosquito Range , in a gap between Mount Lincoln (west) and Hoosier Ridge (east).

  6. List of railroad crossings of the North American continental ...

    en.wikipedia.org/wiki/List_of_railroad_crossings...

    Two sides of the Great Divide Basin; Robinson is the true Divide (per USGS) Hadsell: Wyoming: 6,930 ft (2,112 m) Rollins Pass: Colorado: 11,660 ft (3,554 m) (1904), 9,239 ft (2,816 m) (1928) Denver, Northwestern and Pacific Railway: Union Pacific Railroad: 1904–present Original alignment replaced in 1928 by the Moffat Tunnel) Jones Pass: Colorado

  7. Future of Earth - Wikipedia

    en.wikipedia.org/wiki/Future_of_Earth

    The iron-rich core region of the Earth is divided into a 2,440 km (1,520 mi) diameter solid inner core and a 6,960 km (4,320 mi) diameter liquid outer core. [69] The rotation of the Earth creates convective eddies in the outer core region that cause it to function as a dynamo . [ 70 ]

  8. Pontiac V8 engine - Wikipedia

    en.wikipedia.org/wiki/Pontiac_V8_engine

    With an identical bore and stroke of 4 + 1 ⁄ 16 in (103.2 mm) and 3 + 3 ⁄ 4 in (95.3 mm) it was precisely half the displacement of the 389 and shared numerous parts with the V8, [4] yet weighed considerably more than half as the engine lower half and block casting were not simply divided down the middle.

  9. Bear Lake (Colorado) - Wikipedia

    en.wikipedia.org/wiki/Bear_Lake_(Colorado)

    Bear Lake, June 2016 Bear Lake in snow, January 2020. Bear Lake is a scenic trailhead and destination in Rocky Mountain National Park. [1] Sitting at an elevation of 9,450 feet (2,880 m), [2] [3] the alpine lake rests beneath the sheer flanks of Hallett Peak and the Continental Divide at