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  2. Kilometres per hour - Wikipedia

    en.wikipedia.org/wiki/Kilometres_per_hour

    SI, and hence the use of "km/h" (or "km h −1 " or "km·h −1 ") has now been adopted around the world in many areas related to health and safety [36] and in metrology [37] in addition to the SI unit metres per second ("m/s", "m s1 " or "m·s1 "). SI is also the preferred system of measure in academia and in education.

  3. HCMC Metro - Wikipedia

    en.wikipedia.org/wiki/HCMC_Metro

    Line 1 is 19.7 km (12.2 mi) long with three underground stations (Bến Thành, Ho Chi Minh City Opera House, and Ba Son) and eleven elevated stations. The three stations above are Vietnam's first underground metro stations. Trains are designed to travel at up to 110 km/h (68 mph) on the elevated sections and up to 80 km/h (50 mph) underground.

  4. Effects of Typhoon Yagi in Vietnam - Wikipedia

    en.wikipedia.org/wiki/Effects_of_Typhoon_Yagi_in...

    Prior to Typhoon Yagi forming and making landfall in Vietnam, domestic media reported unusual weather patterns in August 2024. Speaking to the Natural Resources and Environment newspaper, Mai Văn Khiêm, Director of the National Center for Hydro-Meteorological Forecasting, stated that the country's average temperature reached 28.3 °C (82.9 °F), the highest in recorded history. [1]

  5. Lạng Sơn - Wikipedia

    en.wikipedia.org/wiki/Lạng_Sơn

    The plain with the average of 2.1 m, with little slope, accounting for 0.2% of the city area (5.76 km 2). Most of the city's commercial, administrative and main streets concentrate in this narrow regions.

  6. Metre per hour - Wikipedia

    en.wikipedia.org/wiki/Metre_per_hour

    Its symbol is m/h or m·h −1 (not to be confused with the imperial unit symbol mph). By definition, an object travelling at a speed of 1 m/h for an hour would move 1 metre. The term is rarely used however as the units of metres per second and kilometres per hour are considered sufficient for the majority of circumstances. Metres per hour can ...

  7. 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.

  8. Speed of sound - Wikipedia

    en.wikipedia.org/wiki/Speed_of_sound

    T 25 is 298.15 K (= 25 °C = 77 °F), giving a value of 346.1 m/s (= 1 135.6 ft/s = 1246 km/h = 774.3 mph = 672.8 kn). In fact, assuming an ideal gas , the speed of sound c depends on temperature and composition only, not on the pressure or density (since these change in lockstep for a given temperature and cancel out).

  9. Metre per second - Wikipedia

    en.wikipedia.org/wiki/Metre_per_second

    ft/s 3.2808 The metre per second is the unit of both speed (a scalar quantity ) and velocity (a vector quantity , which has direction and magnitude) in the International System of Units (SI), equal to the speed of a body covering a distance of one metre in a time of one second .