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  2. Air mass (astronomy) - Wikipedia

    en.wikipedia.org/wiki/Air_mass_(astronomy)

    The air mass then is simply the secant of the zenith angle : =. At a zenith angle of 60°, the air mass is approximately 2. However, because the Earth is not flat, this formula is only usable for zenith angles up to about 60° to 75°, depending on accuracy requirements.

  3. Air mass - Wikipedia

    en.wikipedia.org/wiki/Air_mass

    Continental and superior air masses are dry, while maritime and monsoon air masses are moist. Weather fronts separate air masses with different density (temperature or moisture) characteristics. Once an air mass moves away from its source region, underlying vegetation and water bodies can quickly modify its character. Classification schemes ...

  4. ABC Kids (Australia) - Wikipedia

    en.wikipedia.org/wiki/ABC_Kids_(Australia)

    ABC for Kids on 2 rebranded as ABC 4 Kids and was refocused as a part-time channel for preschoolers sharing the same bandwidth of ABC2 between 6am and 7pm. A new logo based on the ABC3 logo was also introduced. [9] In early 2014 all children's programming was removed from the main ABC channel and was divided between ABC 4 Kids and ABC3. [10]

  5. Atmospheric circulation - Wikipedia

    en.wikipedia.org/wiki/Atmospheric_circulation

    The Hadley cell is a closed circulation loop which begins at the equator. There, moist air is warmed by the Earth's surface, decreases in density and rises. A similar air mass rising on the other side of the equator forces those rising air masses to move poleward. The rising air creates a low pressure zone near the equator.

  6. Children's programming on ABC Television - Wikipedia

    en.wikipedia.org/wiki/Children's_programming_on...

    However, during pre-schoolers' programming, the ABC network identities were replaced with more child-friendly animations, displaying a new "ABC For Kids" identity. [citation needed] On 4 December 2009, the children's programming block on ABC2 was rebranded "ABC For Kids on 2" with new identities, schedule and watermark.

  7. YouTube Kids - Wikipedia

    en.wikipedia.org/wiki/YouTube_Kids

    YouTube Kids has faced criticism from advocacy groups, particularly the Fairplay Organization, for concerns surrounding the app's use of commercial advertising, as well as algorithmic suggestions of videos that may be inappropriate for the app's target audience, as the app has been associated with a controversy surrounding disturbing or violent ...

  8. ABC Kids - Wikipedia

    en.wikipedia.org/wiki/ABC_Kids

    ABC Kids (Australia), a part-time digital TV channel for preschoolers from the Australian Broadcasting Corporation; The brand name for the Australian Broadcasting Corporation's children's programming on ABC Television prior to 2009; ABC Kids (TV programming block), a defunct youth's programming block on American Broadcasting Company in the ...

  9. Atmosphere of Earth - Wikipedia

    en.wikipedia.org/wiki/Atmosphere_of_Earth

    Total atmospheric mass is 5.1480 × 10 18 kg (1.13494 × 10 19 lb), [36] about 2.5% less than would be inferred from the average sea-level pressure and Earth's area of 51007.2 megahectares, this portion being displaced by Earth's mountainous terrain. Atmospheric pressure is the total weight of the air above unit area at the point where the ...

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