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2. List of junior world records in swimming - Wikipedia

   en.wikipedia.org/wiki/List_of_junior_world...

   FINA World Junior Records in 25m pool are recognised starting on January 1, 2015. Records are recognized for long course (50 m pool) and short course (25 m pool) in the following events: relays: 4×50 free (short course only), 4×100 free, 4×200 free, 4×50 medley (short course only) and 4×100 medley. Also recognized are mixed relay records ...

3. 2-meter band - Wikipedia

   en.wikipedia.org/wiki/2-meter_band

   The 2-meter amateur radio band is a portion of the VHF radio spectrum that comprises frequencies stretching from 144 MHz to 148 MHz [ 1] in International Telecommunication Union region (ITU) Regions 2 (North and South America plus Hawaii) and 3 (Asia and Oceania) [ 2] [ 3] and from 144 MHz to 146 MHz in ITU Region 1 (Europe, Africa, and Russia).

4. Metre - Wikipedia

   en.wikipedia.org/wiki/Metre

   The metre (or meter in US spelling; symbol: m) is the base unit of length in the International System of Units (SI). Since 2019, the metre has been defined as the length of the path travelled by light in vacuum during a time interval of ⁠ 1 299 792 458⁠ of a second, where the second is defined by a hyperfine transition frequency of caesium.

5. World record progression 1500 metres freestyle - Wikipedia

   en.wikipedia.org/wiki/World_record_progression...

   The first world record in the men's 1500 metres freestyle in a long course (50 metres) swimming pool was recognised by the International Swimming Federation (FINA) in 1908. [ 1] In short course (25 metres) pools, the world's governing body recognizes world records since March 3, 1991.

6. World record progression 200 metres freestyle - Wikipedia

   en.wikipedia.org/wiki/World_record_progression...

   This is a history of the progression of the world record for the 200 metres freestyle swimming event. It is a listing of the fastest-times-ever swum in the event, in both long course (50m) and short course (25m) swimming pools. These records are maintained and recognized by FINA, which oversees international competitive swimming and Aquatics.

7. Square metre - Wikipedia

   en.wikipedia.org/wiki/Square_metre

   Square metre. The square metre ( international spelling as used by the International Bureau of Weights and Measures) or square meter ( American spelling) is the unit of area in the International System of Units (SI) with symbol m2. [ 1] It is the area of a square with sides one metre in length. Adding and subtracting SI prefixes creates ...

8. Orders of magnitude (length) - Wikipedia

   en.wikipedia.org/wiki/Orders_of_magnitude_(length)

   The nanometre ( SI symbol: nm) is a unit of length in the metric system equal to 10−9 metres ( ⁠ 1 1 000 000 000⁠ m = 0.000 000 001 m ). To help compare different orders of magnitude, this section lists lengths between 10 −9 and 10 −8 m (1 nm and 10 nm). 1 nm – diameter of a carbon nanotube.

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   www.aol.com/games/play/masque-publishing/blocked-10

   Discover the best free online games at AOL.com - Play board, card, casino, puzzle and many more online games while chatting with others in real-time.