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  2. Speed of light - Wikipedia

    en.wikipedia.org/wiki/Speed_of_Light

    From the angular difference in the position of stars (maximally 20.5 arcseconds) [97] it is possible to express the speed of light in terms of the Earth's velocity around the Sun, which with the known length of a year can be converted to the time needed to travel from the Sun to the Earth.

  3. Unit of time - Wikipedia

    en.wikipedia.org/wiki/Unit_of_time

    The Jiffy is the amount of time light takes to travel one femtometre (about the diameter of a nucleon). The Planck time is the time that light takes to travel one Planck length. The TU (for time unit) is a unit of time defined as 1024 μs for use in engineering. The svedberg is a time unit used for sedimentation rates (usually

  4. Miles per hour - Wikipedia

    en.wikipedia.org/wiki/Miles_per_hour

    Miles per hour (mph, m.p.h., MPH, or mi/h) is a British imperial and United States customary unit of speed expressing the number of miles travelled in one hour. It is used in the United Kingdom , the United States , and a number of smaller countries, most of which are UK or US territories, or have close historical ties with the UK or US.

  5. List of vehicle speed records - Wikipedia

    en.wikipedia.org/wiki/List_of_vehicle_speed_records

    Uncrewed torpedo speed claims range from 60 knots (110 km/h; 69 mph) for the British Spearfish torpedo [64] to 200 knots (370 km/h; 230 mph) for the Russian VA-111 Shkval. [ 65 ] ^ a b Ground effect vehicles (a.k.a. "Wing-In-Ground effect vehicles") are classified as maritime vessels, rather than aircraft, by the International Maritime ...

  6. Watch a pro baseball player try to hit a 180 mph fastball - AOL

    www.aol.com/news/2014-08-29-watch-a-pro-baseball...

    By RYAN GORMAN This is what happens when a pro baseball player tries to hit a 180-something mph fastball. Takeshi Yamasaki, a former star player with the Chunichi Dragons in Japan, was given the ...

  7. The country did a complete 180 on a once-divisive issue ...

    www.aol.com/country-did-complete-180-once...

    The state’s Republican governor at the time, Mitt Romney, planned to invoke an archaic 1913 law in an attempt to bar same-sex couples from traveling from other states to obtain marriages in ...

  8. Resurfaced clip shows how Trump did a complete 180 on ... - AOL

    www.aol.com/resurfaced-clip-shows-trump-did...

    The April 2016 clip shows Trump, then considered a long-shot presidential candidate, telling the “Today” show hosts that transgender Americans should be allowed to use any bathroom they want.

  9. Light-second - Wikipedia

    en.wikipedia.org/wiki/Light-second

    The light-second is a unit of length useful in astronomy, telecommunications and relativistic physics. It is defined as the distance that light travels in free space in one second , and is equal to exactly 299 792 458 m (approximately 983 571 055 ft or 186 282 miles ).