High speed Definition and 87 Threads

High-speed rail (HSR) is a type of rail transport that runs significantly faster than traditional rail traffic, using an integrated system of specialized rolling stock and dedicated tracks. While there is no single standard that applies worldwide, new lines in excess of 250 kilometres per hour (160 mph) and existing lines in excess of 200 kilometres per hour (120 mph) are widely considered to be high-speed. The first high-speed rail system, the Tōkaidō Shinkansen, began operations in Japan in 1964 and was widely known as the bullet train. High-speed trains mostly operate on standard gauge tracks of continuously welded rail on grade-separated right-of-way that incorporates a large turning radius in its design, however certain regions with wider legacy railways, such as Russia have sought to develop a high speed railway network in broad gauge.
Several countries have built and developed high-speed rail infrastructure to connect major cities, including Belgium, China, Denmark, France, Germany, Italy, Japan, Morocco, the Netherlands, Poland, Russia, Saudi Arabia, South Korea, Spain, Sweden, Taiwan, Turkey, the United Kingdom, the United States and Uzbekistan. Only in Europe does high-speed rail cross international borders. China had built over 37,900 kilometres (23,500 mi) of high-speed rail as of December 2020, accounting for more than two-thirds of the world's total.High-speed rail is the fastest ground-based commercial transportation. The Shanghai Maglev Train, opened in 2004, is the fastest commercial passenger maglev in operation, at 430 km/h. The Euroduplex TGV trains broke a record of 574.8 km/h, making it the fastest conventional wheeled train. The Chuo Shinkansen in Japan is a maglev line under construction from Tokyo to Osaka at commercial speeds of 500 km/h, with operations due to start in 2027.

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  1. G

    Why Does a Car Wheel Spin Backwards at High Speed?

    I'm sure this is a dumb question, hence why I ask people of da netz. So, when a car wheel spins slow/medium speed, you can see it make revolutions. But then it goes faster, you cannot see it make individual rotations. Duh. I get that...but why does it appear to spin slowly BACKWARDS? I...
  2. C

    India's High Speed Trains: Reason & Solutions

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  3. V

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    Hello everyone Iam doing my M.S in aerospace engineering at Chennai, India. I require a high-speed operating pneumatic valve that can open and close more than 200 times a second. Kindly allow me to know if it is possible to acquire such a valve with these additional specifications also: > 2...
  4. K

    Extreme high speed wireless range

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  5. E

    High speed polymerization reaction initiated by the action

    So what's happening is a high speed polymerization reaction initiated by the action of laser light. An infrared beam moniters the amount of unreacted acrylate double bonds. But what is an acrylate double bond? Am I correct in saying that a double bond absorbs IR radiation? The double bond...
  6. I

    Variable frequency drive for high speed spindle

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  7. L

    Ricky Bobby: High Speed Adventure on the Highway

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  8. R

    Find Reliable High Speed Internet Providers Near You - Get Connected Now!

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  9. P

    Efficient High Speed Actuation System for 80x100x4mm Plate - 40ms Response Time

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  10. N

    How Can I Build a Sound Activated Shutter for High Speed Photography?

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  11. C

    Getting high speed from a slow moving object.

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  12. R

    Build High Speed Winch: 350lbs, 10ft/sec, Control Speed

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  13. W

    High speed camera projectile motion

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  14. W

    Help Projectile Motion and High Speed Camera

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  15. W

    Help Projectile Motion High Speed Camera

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  16. B

    Efficiency of RWD vs. AWD at high speed

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  17. B

    Is High Speed Space Travel Feasible with the Risk of Space Debris?

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  18. I

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  19. C

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  20. R

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  21. M

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  22. J

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  23. S

    High speed winds blowing over the ocean

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  24. T

    Air resistance of a high speed car

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  25. N

    Question about return current in high speed design

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  26. C

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  27. R

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  28. I

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  29. himanshu121

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  30. R

    High speed semiconductor devices

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  31. N

    The Effects of Relativistic Mass on High Speed Collisions

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  32. L

    Energy of motion at high speed

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  33. W

    Help with Torque Calculation for High Speed Drill

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  34. A

    High speed jets used in rocket engines

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  35. M

    Why Does a Chain Snap Between Train Cars at High Speeds in Relativity?

    I have been informed that if: There is two train cars connected by a chain that will snap if extended by more than 1%. The cars accelerate at exactly the same rate, so the distance between them remains constant. As they speed up to very high velocity and special theory of relativity start...
  36. D

    Understanding the Equation for High Speed Energy

    In the equation: KE = mc^2 - m0c^2 (can be seen more cleary: http://hyperphysics.phy-astr.gsu.edu/hbase/relativ/releng.html#c1) What does " m0 " stand for? And this equation will give me the kinetic and rest mass energy of only a high speed particle? Ty
  37. Saint

    When do you think we will have high speed Internet

    When do you think we will have high speed Internet (>10MB download rate) everywhere (even on top of mount Everest, the artic/antartic)? Another 20 years? What is the roadmap for internet in the next 10 years? :cool:
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